Revolver taken in hand by driver (5)
I believe the answer is:
wheel
'revolver' is the definition.
(wheels revolve around)
'in hand by driver' is the wordplay.
I cannot really understand how this works, but
'hand' could be 'l' (abbreviation for left, as in the left-hand side) and 'l' is located in the answer.
The remaining letters 'whee' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'taken' acts as a link.
Can you help me to learn more?
(Other definitions for wheel that I've seen before include "Twenty nine [TURN]" , "Turn, rotate" , "- - of Fortune" , "Ferris -; Catherine -" , "Turn round quickly" .)