Arrest for a quarrel (3,2)
I believe the answer is:
run in
I believe this is a double definition.
'arrest' is the first definition.
(I've seen this before)
'a quarrel' is the second definition.
(I know that quarrel can be written as run-in)
'for' acts as a link.
(Other definitions for run in that I've seen before include "Final stage" , "Quarrel; set-to" , "Brush" , "final stages of race" , "Dispute" .)