Kids bound to support cricket side (9)
I believe the answer is:
offspring
'kids' is the definition.
(I've seen this in another clue)
'bound to support cricket side' is the wordplay.
'bound' becomes 'spring' (both can mean to leap).
'to support' says to put letters next to each other (in a down clue, some letters hold others up).
'cricket side' becomes 'off'.
'spring' after 'off' is 'OFFSPRING'.
(Other definitions for offspring that I've seen before include "Child" , "Issue for raising" , "Young" , "progeny,issue" , "Progeny" .)