16d) Type of projectile bomb? All is tickety-boo inside (9)
17a) Origin of sore head? Errors union introduced (5)
21d) Swallow one drink (7)
25a) Golfer played across middle of green, one of two in front (7)
29a) Funny man takes off Flook and his like (5,6)
Apology for no letters. All help much appreciated