Can she handle a revolver? (5)
I believe the answer is:
pearl
'can she' is the definition.
'Pearl' can be an answer for 'she'. I'm not certain of the 'can' bit.
'handle a revolver?' is the wordplay.
I cannot really see how this works, but
'handle' could be 'ear' (I've seen this in another clue) and 'ear' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for pearl that I've seen before include "Oyster's gem" , "Girl < , pretty" , "greatly valued" , "Highly-valued thing" , "Precious stone from shellfish" .)