Arrest follows from a quarrel (3,2)
I believe the answer is:
run in
This clue could be a double definition.
'arrest follows' is the first definition.
'run in' can be an answer for 'arrest' (I've seen this before). I am not sure about the 'follows' bit.
'a quarrel' is the second definition.
(I know that quarrel can be written as run-in)
'from' acts as a link.
Can you help me to learn more?
(Other definitions for run in that I've seen before include "Approach -- disagreement" , "Apprehend" , "Carefully bring to full working order - arrest" , "Prepare to deliver" , "Dustup, quarrel" .)