Key cricketer? (6)
I believe the answer is:
opener
I believe this clue is a double definition.
'key' is the first definition.
(I've seen this before)
'cricketer?' is the second definition.
(batsman who opens the batting)
(Other definitions for opener that I've seen before include "Leading cricketer" , "Tool for taking lid off a can" , "cricketer receiving the first ball?" , "First goal in game" , "Batsman who starts innings" .)