4  Guard dogs maul assailant (9)

 9  It turns both ways (7)

10 Sounding a horn in part of Wandsworth borough (7)

11 Probability that it's not two, four, six, etc (4)

12 Mountain climbing at last in high Urals – idiot! (9)

15 Old woman puts dodgy condoms on military chaps (9)

17 Airman has plan to fly round India (5)

18 Shy boy attracts contrary girl (5)

20 Vanbrugh’s assistant put slabs by back parlour, say (9)

23 Put out by philosophical man giving you a tobacco box (5,4)

24 Nothing’s taboo in a Scottish town (4)

27 Organ man has to play badly accompanying artist that’s half-cut? (7)

28 Inspiring admiration, first-class location for a golf major (7)

29 Southpaw trains vigorously in short gown (9)

30 Tugs – many such found at Boston Harbor? (5)

 1  Narcotics bust by Yard in capital (6,4)

 2  It’s crazy to quit swinging city (7)

 3  Hits Mrs Cotton’s son (4)

 4  A small portion of goulash adds fat on bottom (7)

 5  Old city’s upstanding administrators (7)

 6  Practising promiscuity by mimicking a particular author? (10)

 7  Girl with a ginormous booty with no top on (7)

 8  Do wrong pinching bottom of young virgin? Possibly (4)

13 Caught Mr and Mrs Capp with small amounts of spun sugar. This? (10)

14 School books finally lost in transit (2,8)

16 Occupying god-awful room with woman in Istanbul? (3)

19 Is this a gay kiss, Robin Gibb? (7)

20 Cigar box cast from rhodium (7)

21 Sarah inhabiting part of a building in Midlands town (7)

22 Man who sang Rockin’ Robin solo (but only half of it) (7)

25 So is it Ruth you kiss finally? (4)

26 Pick up fruit. It’s not much to look at (4)