Mad cricketers (4)
I believe the answer is:
bats
I believe this clue is a double definition.
'mad' is the first definition.
(informal term for mad)
'cricketers' is the second definition.
(I've seen this before)
(Other definitions for bats that I've seen before include "Clubs; flying mammals" , "Hits" , "out to lunch" , "Cricketers" , "Take a stab at the night creatures" .)