Quarrelled or came back married (5)
I believe the answer is:
rowed
'quarrelled' is the definition.
(I've seen this before)
'or came back married' is the wordplay.
'came back' is a reversal indicator.
'married' becomes 'wed' (wed can mean married).
'or' back-to-front is 'ro'.
'ro'+'wed'='ROWED'
(Other definitions for rowed that I've seen before include "Oared" , "Used oars" , "Plied the oars" , "Was in Boat Race maybe" , "Maybe went from Putney to Mortlake" .)