7  Corporations rejected blue material (4)

 9  What non-professional players do in the morning? Drink! (2-4)

10 Upset Paul, and have profound changes (8)

11 Desert islander working to change course following some birds (8,6)

13 It’s represented by Phi and Conto – legends I recollected (6,7)

15 Betrayed like the chicken back from the other side of the road (6-7)

17 Manufacturing of goods ... or services? (4,10)

20 Shell, almost full of round and piercing nasties at first (8)

22 Long-wavelength radiation: it is an eye problem (6)

23 Impel operations director to shrug off son (4)

24 Awkwardly engage cleaner to come round and go in first, perhaps (6,4)

 2  Old Republican supports gun protection for Americans (5)

 3  Horrible crumbles with eel and bits of brain (11)

 4  Zest of the French men cavorting with Pole (5,4)

 5  Oxford Union leaders engaged in a half-written question about water (7)

 6  Moral code thickos embraced (5)

 7  It’s associated with old man from Hemingway’s ‘Red or Dead’ (3)

 8  Shifting dune and/or plain (9)

12 Dull network of agents heard following leader of opposition out of union (11)

13 Play The Frog da capo (9)

14 Getting low sound of suffering to be accepted by Conservative group (9)

16 Mark under letter ‘I’, called stupid (7)

18 Say, are you new in charge of old characters? (5)

19 African settler, vegetarian, half threw up (5)

21 Cut times in casualty dept. (3)