Cryptic crossword

ACROSS

1 Smarten up flier that is about

tax (8)

5 Formulate a maths problem

involving tubes (6)

9 Press and TV rubbish retired

broker (8)

10 Worker lacks training as

speaker (6)

12 Stone axes feasible at the

outset (4)

13 Venus’s afterlife? (5,5)

15 Dodgy activity or accidental

exercise? (5,8)

19 One stranded, drifting round city abroad, needs these (8,5)

23 Break up labour cell denoting

shop-floor workers (4-6)

25 County’s senior citizen runs

off (4)

28 Jacks in work finally on parts

of churches (6)

29 Evil sibling kept at home (8)

30 Nervous and unsteady, sadly

losing odd bits of data (6)

31 Cross old farceur’s premature

end (8)

DOWN

1 Lively girl’s plaything impresses old medic (6)

2 Obsequious type has change

of heart at present (5)

3 Butcher calves, rejecting

extremities, for this (4)

4 Dance music Stewpot broadcast (3-4)

6 Verrucas come up — the last

one’s intolerable (5)

7 Most Irish rambles stray (3-2-4)

8 Shortened plug, inserting

spanner (8)

11 Dread female listener (4)

14 Trading centre’s public vehicle pulled up (4)

15 Start to solve cryptic clue in

head? Just guess! (9)

16 Work and have fun without

adult (3)

17 Restrain mongrel beginning

to bark (4)

18 Town in Mali initially but

somehow captivating us? (8)

20 Piece of vital knowledge

means converse (4)

21 A hundred and fifty four in

Bonn possess a keyboard (7)

22 Spring course abandoned (6)

24 Game on board won by first

mate (5)

26 Daisy’s left after leader

leaves festival (5)

27 Livestock consists of colts

and this sort of chicken (4)