Some good words in here! There are some really lovely clues, but I'm not convinced of my parse of a few of them. 10A is the closest I could get, but removal after reversal is a new one to me! 26D has me really stumped, but I think I'm as close as I can get on that one. But other than that, 12A and 7D were pretty clever, so it almost balances out.

Across

1

Heroic visit to all bases in command (7)
HOMERIC — HOMER (visit to all bases) IC (in command)

5

Commanding Officer murmurs about point of silken threads (7)
COCOONS — CO (commanding officer) COOS (murmurs) around N (point)

9

Emotional control with initial bad influence (4-5)
WILL-POWER — W (first letter of with) ILL (bad) POWER (influence)

10

Introduce new thane around without hesitation (5)
ENTER — reversal (around) of RE (new) ThaNE without ah (hesitation)

11

Man has beer at ten (4)
ALEX — ALE (beer) X (ten)

12

Unnatural new clarification without study (10)
ARTIFICIAL — anagram (new) of CLARIFIcATIon without con (study)

14

Signal first half at half time initially. See? (5)
SIGHT — SIG (first half of signal) HT (first letters of half time)

16

Musical works, dry and played with best heart (9)
SERENADES — SERE (dry) anagram (played) of AND, ES (middle letters of best)

18

Carried around a liberal man in the city (9)
BALTIMORE — BORE (carried) around A L (liberal) TIM (man)

21

Can start erythema, a skin disease (5)
TINEA — TIN (can) E (first letter of erythema) A

23

Heavy balls having importance (10)
OVERWEIGHT — OVER (balls) WEIGHT (importance)

24

Lively fellow to work with royal (4)
GOER — GO (to work) ER (royal)

27

No soldier comes back to the Spanish, man (5)
NIGEL — N (no) reversal (comes back) of GI (soldier) EL (the Spanish)

28

Officer with temporary sides in navy building (9)
ADMIRALTY — ADMIRAL (officer) TY (outside letters of temporary)

29

Italian governor does tap dance (7)
PODESTA — anagram (dance) of DOES TAP

30

Senior constable dismissed, looked around (7)
SCOUTED — SC (senior constable) OUTED (dismissed)

Down

1

Seats held up in wild show (7)
HOWDAHS — reversal (up) of HAD in anagram (wild) of SHOW

2

Affray in Fairholme, Leeds (5)
MELEE — hidden in fairholME LEEds

3

Charges boom up (4)
RAPS — reversal (up) of SPAR (boom)

4

Sad crow, sad chickens (7)
COWARDS — anagram (sad) of CROW SAD

5

Woman beginning to run a warship (7)
CARRIER — CARRIE (woman) R (first letter of run)

6

Bill is less welcome to believe celebrity (6,4)
CREDIT NOTE — CREDIT (welcome to believe) NOTE (celebrity)

7

Ordered abroad for exchange and beaten on the lot (9)
OUTBIDDEN — BIDDEN OUT (ordered abroad) for exchange (switch words)

8

Spiral ornaments in Supreme Court registers (7)
SCROLLS — SC (supreme court) ROLLS (registers)

13

Wire stalls roughly built. They're stepped round (10)
STAIRWELLS — anagram (roughly built) of WIRE STALLS

15

Soldier and officer on border with diamonds of the highest quality (4-5)
GILT-EDGED — GI (soldier) LT (officer) EDGE (border) D (diamonds)

17

Make a mistake with English on rights (3)
ERR — E (English) RR (rights)

18

Enlarged and dynamited (5,2)
BLOWN UP — double def.

19

Fair enough, accepted mostly - away from the city (7)
OKINAWA — OK (fair enough) IN (accepted) AWA (most of away)

20

Uncovers old explorer starting to smell (7)
EXHUMES — EX (old) HUME (explorer) S (first letter of smell)

22

Ordered artist back on ready organisation (7)
ARRAYED — reversal (back) of RA (artist) anagram (organisation) of READY

25

No women permitted, just a little bird (5)
OWLET — O (no) W (women) LET (permitted)

26

A raven about to circle runs between banks in Italy (4)
ARNO — A RN (outside letters of raven) O (circle)