cryptic crossword

ACROSS

1 Problem in maths class (8)

5 Roughly put together bit of

old road (6)

9 Relative’s American, like its

government (5,3)

10 Well-known female, second

in Australia (6)

12 Students welcoming university’s quiet period (4)

13 Harry hosted Mary for the

present time in U.S. (7,3)

15 Suspicious goings-on in comedy profession (5,8)

19 Roaming about through, say,

Rhode Island state (13)

23 To inhibit bacteria Bertha and

I worked with this? (10)

25 Second vehicle shows sign of

damage (4)

28 Handy digger allowed back

to cover bank (6)

29 Former racing driver

yearned audibly for slope (8)

30 Park keeper’s over leaving

off-roader (6)

31 U.S. retailer rejected deposit

for wood (8)

DOWN

1 Posh head of bank cut benefit

twice over (6)

2 Book about accountant associated with ‘The Voice’ (5)

3 Staunch supporter of 7 (4)

4 Where people pray for a Conservative (not loudly) (7)

6 Broadcasting Bavarian orchestra’s upcoming piece (2,3)

7 Pitt eats duck and Affleck eats

a pulse (5,4)

8 Writer is in Paris holding talks

about Independent (8)

11 Old solver locked in Somerset

House (4)

14 Overlaying silver with tin

presents problem (4)

15 Oldest trees split, black on

the inside (5-4)

16 It prohibits booze and narcotics primarily (3)

17 Flag of Fair Isle (4)

18 Special coffee recipe spread

around everywhere (8)

20 Press turned up during

minor incident (4)

21 Bitterness I had briefly encountered in a big town (7)

22 Stop moving decorative strip

on wall, say (6)

24 Long note reverberates

somewhat when raised (5)

26 Old Christian symbol proclaimed in African capital (5)

27 Fine ale brewed in hopper (4)