4  Flower that can be blue, white or a sort of green (4)

 9  Ancient king was an occasional enemy (according to Spooner) (7)

10 Mother with a well-preserved body? (5)

11 Free old con nearly at end of sentence (9)

12 Show disapproval of some substitutions (3)

13 Origins of Sixth Century horse dung gatherer (6)

15 Leader of first one then a second company disaster (6)

17 French vineyard circus visited occasionally (3)

18 Client somehow gets hold of contact number for creative thinker (9)

21 Throw her in the river, as they say in Germany (5)

22 Teacher having favourite on reflection is a bad move (7)

23 Like pie or a piece of cake (4)

24 Isis or maybe another god (6)

 1  Evergreen from dictator's Mediterranean island (7)

 2  Engineers play a part and push back (5)

 3  Medical tests reveal synthetic amine's a toxin (12)

 5  People given time at home with friends (7)

 6  Dodgy type concealed source of gold in this country (5)

 7  Hear exotic bird (4)

 8  Slimiest pair become empire builders (12)

14 Lucky charms a Greek character hires out (7)

16 Month with no drink upset army type (7)

17 Swear route has nothing removed (5)

19 Monument to doctor (4)

20 Key often used to get in (5)