Cricket practice (4)
I believe the answer is:
nets
'cricket practice' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nets that I've seen before include "Meshes to catch fish, say" , "Traps, to catch fish say" , "'Traps for 29 dn, say (4)'" , "Cricket practice venue" , "Lacy curtains" .)