Issue involving former partner quietly abandoning trip (7)
I believe the answer is:
edition
'issue' is the definition.
(edition is a kind of issue)
I can't explain the rest of the clue.
(Other definitions for edition that I've seen before include "Issue; version" , "in printed form" , "Copy - I tied on (anag)" , "Issue of a publication" , "Number of copies printed at one time" .)