Some courts and pitches where children may play (7)
I believe the answer is:
sandpit
'where children may play' is the definition.
'some courts and pitches' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'SANDPIT' is hidden within 'courts and pitches'.
(Other definitions for sandpit that I've seen before include "Child's play area" , "Children's play area - it'd snap (anag)" , "place where youngsters can play" , "Playground feature" , "area for kids to play in" .)