Coffee Break Cryptic

11 May

Across

1 Date for betrothal? (10)
7 Old song concerning an idler (8)
8 Repeated sound from the choir (4)
9 Australian runners entertained by dance music (4)
10 Do they rally round when Fred's in trouble? (7)
12 No specialists in a 50-50 game (3-8)
14 Saint revealing deception by old man (7)
16 Produce a picture of a tie (4)
19 Slav embraced by Kaiser Bill (4)
20 Gourmets providing us with recipe? (8)
21 A sort of tender name! (10)

Down

1 With a little rubber a secretary may rub out (5)
2 King George has a double but not all at once (7)
3 Develop good line (4)
4 Grim aunt possibly becoming mellow (8)
5 French resort overwhelming English family member (5)
6 Colonist in Africa or a Greek island (6)
11 Tangible building material (8)
12 A puzzling layout? Daughter is gobsmacked (6)
13 On the way from France? (2,5)
15 Hood for a bird (5)
17 Crop needing warmth after onset of winter (5)
18 Couturier needing half of studio? Right! (4)