Come across dispute - wife leaving couple (3,4)
I believe the answer is:
run into
'come across' is the definition.
(synonyms)
'dispute wife leaving couple' is the wordplay.
I cannot really understand how this works, but
'dispute' could be 'runin' (run-in is a kind of dispute) and 'runin' is found within the answer.
The remaining letters 'to' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for run into that I've seen before include "Meet (someone) unexpectedly" , "charge?" , "Happen to meet or collide with" , "Meet accidentally on the trot?" , "Happen to meet - with a bump?" .)