About double for another fight (7)
I believe the answer is:
rematch
'another fight' is the definition.
(eg a boxing match)
'about double' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'double' becomes 'match' (match can mean double or duplicate).
're'+'match'='REMATCH'
'for' is the link.
(Other definitions for rematch that I've seen before include "Return game" , "Later encounter" , "Another game" , "Teams' second game" , "Return fixture" .)