4 With added cocaine, I'm thinking (3)
9 Dubai's new numerical puzzle finally in the Listener's domain? (7)
10 Ronnie and Reggie's very fine travel organisation? (7)
11 Please help us habitual drinkers! (5)
12 Starts back, but not with Atahualpa among them (4,5)
13 Rampant dingo impregnates the whole Biology group (10)
14 Something circuitous in logic dismissive of N Circular of old (4)
17 Means to spend a day at the Colosseum, having got on (7)
19 Whenever drinking ale rounds, hope eventually for this? (7)
20 Unpackaged utensils for afternoon refreshment facility (4)
21 "No mistake", Dynamo team source admits, not playing club in Transvaal (10)
24 Missing mass, soldier enters cathedral without delay (9)
26 Musical or poetic legend, but not the last (5)
28 How showy quartz/mica rock can be without one (7)
29 Perverse tree-hugging aspect to personality, summing up (2,1,4)
30 Plant, essentially, needs pruning (3)