5  Shoe block (4)

 9  Legendary American generous to settle the bill (7)

10 Aged thespian found near Manchester (6)

11 I let cat initially have stew - sporty! (8)

12 Sailors board part of ship - that's the important part (6)

15 Where Reg and Dan play among the flowers? (6)

18 Left one's post with calm submission (8)

20 Card game - pontoon? Perhaps (6)

22 Home Counties carnival venue attracts you and me - it's no laughing matter (7)

23 Duo once unevenly finished (4)

24 Sings like the Swiss? Yes, old medley (6)

 2  Circulates gold pieces (6)

 3  Flung about in ebbing river and swallowed up (8)

 4  Amazingly tutor fish (5)

 6  Go ahead - it's heavy metal! (4)

 7  Musical lubricant (6)

 8  Thickset - keep unknown quantity (6)

13 Rio Grande almost completely regenerated by this bypass (4,4)

14 Peacekeepers to take it easy ? Not with this going on! (6)

16  Frightened of a loud incursion (6)

17 Treacherous person - Lee was found out (6)

19 Turn sprinkler on cut flowers (5)

21 Blue swallow (4)