Across

1: Son, I am French without myself (5)

4: Bird male re-election (5)

5: Yuan Desert's a weird holiday (6,6)

10: Big animal - sounds like dessert! (5)

12: Debut of umbrella containing meat substitute (4)

13: Cereal initially rouses young Egyptians (3)

15: Madman's seed bag (7)

16: Coupon's start implies confidence (5)

17: Full circle over massive charge (5)

18: Utterly destroy everything (5)

19: Gravy oddly likes men (3)

20: Programmer in-law's man from hell (5)

Down

1: Toilet with the swirling bat spit a good washer (4,3,7)

2: Lumberjack on the radio's more bruised (5)

3: Evil ends of samurai neckerchief unveil (6)

6: Take in shortened advertising option (5)

7: Pair hides up in thundercloud (3)

8: Teenage Man U footballer heard at beginning (5)

9: Me in an ultimate word (4)

11: Regularly visit Libyan website (10)

14: Alec leaving mad preacher (11)

19: Run from ground deity! (3)