Bit of gear you might have a hand in (6)
I believe the answer is:
sleeve
This clue could be a double definition.
'bit of gear' is the first definition.
(part of clothing)
'a hand in' is the second definition.
I know that 'hand' relates to this answer. I also know that both the answer and definition are singular nouns
'you might have' acts as a link.
Can you help me to learn more?
(Other definitions for sleeve that I've seen before include "Container for LP" , "with something to hide?" , "An arm goes into it - or a music album" , "Garment's arm" , "Possibly hiding-place for ace" .)