Good fun, nothing particularly tricky!

Across

1

Meal tapers off (6)
REPAST — anagram (off) of TAPERS

4

Fabricate revealing biography, mostly, that is (4,1,3)
TELL A LIE — TELL ALl (revealing biography, without last letter) IE (that is)

9

Oddly, who am I - beast or animal? (6)
WOMBAT — odd letters of who am I beast

10

Respects new symbols of sovereignty (8)
SCEPTRES — anagram (new) of RESPECTS

12

Way to style hair and boogie profusely (2,9)
IN ABUNDANCE — IN A BUN (way to style hair) BOOGIE (dance)

15

Old writing surface's rough trench map (9)
PARCHMENT — anagram (rough) of TRENCH MAP

16

Where you glossed over, left upset (5)
SPILL — reversal (over) of LIPS (where you glossed) L (left)

17

Simpsons' clown shakes head, out of practice (5)
RUSTY — kRUSTY (Simpsons' clown, without first letter)

18

Falcon for each one in revamped green (9)
PEREGRINE — PER (for each) I (one) inside anagram (revamped) of GREEN

19

Twists or not, in discussion of way to tie a tie (7,4)
WINDSOR KNOT — WINDS (twists) OR, homophone (in discussion) of NOT

23

Film artist designs Martian, bringing in Oscar (8)
ANIMATOR — anagram (designs) of MARTIAN containing O (oscar)

24

Checks out foliage (6)
LEAVES — double def.

25

Nervousness from last minute rebuilding designs (8)
EDGINESS — E (last letter of minute) anagram (rebuilding) of DESIGNS

26

Planet's fury sank busy hearts (6)
URANUS — middle letters of fURy sANk bUSy

Down

1

Disputes lines (4)
ROWS — double def.

2

Ceremony sees top muso interrupting musical category (4)
POMP — M (first letter of muso) inside POP (musical category)

3

Crafty, welcoming, generous, with no thought of your own (9)
SLAVISHLY — SLY (crafty) containing LAVISH (generous)

5

Coming up against eleven sides opposing (12)
ENCOUNTERING — EN (outside letters of eleven) COUNTERING (opposing)

6

Bounded around in crude polka (5)
LOPED — reversal (around) of hidden in cruDE POLka

7

A tiny girl's suffering hoarseness (10)
LARYNGITIS — anagram (suffering) of A TINY GIRL'S

8

They blow in with propaganda after long weekend (10)
EASTERLIES — EASTER (long weekend) LIES (propaganda)

11

They sell press a lesson in another format (12)
SALESPERSONS — anagram (in another format) of PRESS A LESSON

13

Sea creature's fabulous tail curls on hearing cry (5,5)
SPERM WHALE — S (last letter of fabulous) PERM (curls) homophone (on hearing) of WAIL (cry)

14

Giving award to first place, feeling bitter (10)
PRESENTING — P (first letter of place) RESENTING (feeling bitter)

16

Tourist quote said guide's timeless (9)
SIGHTSEER — homophone (said) of CITE (quote) StEER (guide) without t (time)

20

Country sends back pest (5)
SPAIN — S (last letter of sends) PAIN (pest)

21

Where you'd roast duck, briefly let off steam (4)
OVEN — O (duck) VENt (let off steam, without last letter)

22

Losing leadership, conceals queries (4)
ASKS — mASKS (conceals, without first letter)