Cricketer's hat (6)
I believe the answer is:
bowler
I believe this clue is a double definition.
'cricketer's' is the first definition.
(bowler is a kind of cricketer)
'hat?' is the second definition.
(I know that bowler is a type of hat)
(Other definitions for bowler that I've seen before include "Hat that is round and hard with a narrow brim" , "Derby" , "Hard hat for cricketer?" , "Posh hat or cricket thrower" , "Posh hat or cricket player" .)