Cryptic crossword No 29,098

1

Mattress up on rock, poor thing? (6)

2

Olympian has dropped American underwear, plain lot in black and white (6)

3

One’s drunk at a formal occasion, so totally sozzled having quaffed last of tequila (5,5)

4

Playing field’s to one side (5)

5

Case of cryptic penned by syndic­ate of Guardian crossword setters arising (9)

6

Country lady wiping brow (4)

7

Tennis tactic where ingenious prods desirable (4-4)

8

Put it another way, agent needs free share (8)

13

So unable to answer with some certainty (2,8)

15

Frying liquid, reverberating sound around fan, I say! (6,3)

16

Dash marked with initial of engraver (8)

17

Document in hand, left (8)

19

Bird has knocked figure on horse over (6)

20

Tired and old battered Guardian employee? (6)

23

Classic location with English rider on order (5)

24

Roman god, King Christian, say (4)