Cricketer one taking cap off? (6)
I believe the answer is:
opener
'cricketer' is the definition.
(batsman who opens the batting)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for opener that I've seen before include "See 1" , "Key -- one of two batsman in a side" , "First going in to bat" , "introduction" , "batsman facing the first ball?" .)