Baseball hitter? (3)
I believe the answer is:
bat
'baseball hitter?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bat that I've seen before include "Night flier" , "The cricketer wields it" , "Night-flyer" , "Small flying mammal - like 11 Across" , "Nocturnal flier" .)