Charge again, or deal's off (6)
I believe the answer is:
reload
'charge again' is the definition.
('load' is an answer for 'charge' so perhaps 'reload' is OK for 'charge again')
'or deal's off' is the wordplay.
'off' is an anagram indicator.
'or'+'deal'='ordeal'
'ordeal' with letters rearranged gives 'RELOAD'.
(Other definitions for reload that I've seen before include "Put bullet in gun - again" , "Put more bullets in" , "Encumber again" , "Prepare to fire again" , "Ordeal (anag.)" .)