What gunners might do -- and unsuccessful cavalry? (8)
I believe the answer is:
recharge
'and unsuccessful cavalry?' is the definition.
I can't judge whether this defines the answer.
'what gunners might do' is the wordplay.
I cannot really see how this works, but
'do' could be 'char' (I've seen this before) and 'char' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for recharge that I've seen before include "Provide with fresh energy (as battery)" , "Give new power" , "Top up (battery)" , "Pass on cost" , "Replenish power supply for, say battery" .)