Nice and smooth, I feel like this has been a pretty good week for the SMH so far! Maybe a bit trickier than the past few days, but nothing controversial.

Across

1

Gradually ruin ruffles or decor (7)
CORRODE — anagram (ruffles) of OF DECOR

5

'Drafts' or 'Spam' cryptically? (4,3)
MAPS OUT — reverse clue of "spam"

9

War's back? I can protest (3-2)
SIT-IN — S (last letter of war's) I TIN (can)

10

Prying into American acts of resistance (9)
UPRISINGS — US (American) containing PRISING (prying)

11

Me, yes even me, beside a Middle Eastern animal (7)
MEERKAT — ME E (even letter of yes) RK (me) A T (middle letter of eastern)

12

Bring back hair product, then goal for superstar (6)
LEGEND — reversal (bring back) of GEL (hair product), END (goal)

15

Comic husband takes in daughter, showing range (5)
WIDTH — WIT (comic) H (husband) containing D (daughter)

16

For starters, mixed paint and I sat (9)
ANTIPASTI — anagram (mixed) of PAINT I SAT

19

Maybe clock magazine article? (9)
TIMEPIECE — TIME (magazine) PIECE (article)

20

Speak or rap and try Eminem's originals (5)
ORATE — first letters of Or Rap And Try Eminem

21

Locks outside, opts oddly for pomposity (3,3)
HOT AIR — HAIR (locks) outside OT (odd letters of opts)

24

Dived second, pursued winning top prize (7)
SWOOPED — S (second) WOOED (pursued) containing P (first letter of prize)

27

Air first two debates, sounding nastier (9)
DEMEANOUR — DE (first two letters of debates) homophone (sounding) of MEANER (nastier)

28

Regularly jogs walkway in Japanese city (5)
OSAKA — even letters of jogs walkway

29

Gets tighter spats after navy rejection (7)
NARROWS — reversal (rejection) of RAN (navy), ROWS (spats)

30

Drop some French coin (7)
DESCENT — DES (some French) CENT (coin)

Down

1

Throw a line to actors (4)
CAST — double def.

2

Go off group crossing road in Dutch city (9)
ROTTERDAM — ROT (go off), TEAM (group) around RD (road)

3

That hurts - approaches gutless joint possession (9)
OWNERSHIP — OW (that hurts) NEaRS (approaches, without middle letter) HIP (joint)

4

Pa measured random rubbish collections (3,7)
EMU PARADES — anagram (random) of PA MEASURED

5

Score old German bread (4)
MARK — double def.

6

Spread over the end (5)
PASTE — PAST (over) E (last letter of the)

7

Snow leopard formerly seen around Uzbekistan's capital (5)
OUNCE — ONCE (formerly) around U (first letter of Uzbekistan)

8

Tries out cricket shots? (4,6)
TEST DRIVES — cryptic def.

13

Nosed out, embodied sorceress and powered up (8,2)
SWITCHED ON — anagram (out) of NOSED around WITCH (sorceress)

14

Throw older concoction into spiritual realm (10)
OTHERWORLD — anagram (concoction) of THROW OLDER

17

Customs for 100 cutting utensils (9)
PROTOCOLS — PRO (for) TOOLS (utensils) containing C (100)

18

Deadlock say, over cooking meal (9)
STALEMATE — STATE (say) around anagram (cooking) of MEAL

23

Florida hotel embraces potato (5)
IDAHO — hidden in florIDA HOtel

25

Reported the Spanish defeat (4)
LOSS — homophone (reported) of LOS (the Spanish)

26

(& 22-down) Set off most irate Oz neighbour (4,5)
EAST TIMOR — anagram (set off) of MOST IRATE