Gets off with a slight upset (7)
I believe the answer is:
alights
'gets off' is the definition.
(I've seen this before)
'with a slight upset' is the wordplay.
'with' says to put letters next to each other.
'upset' indicates an anagram.
'slight' anagrammed gives 'lights'.
'a' next to 'lights' is 'ALIGHTS'.
(Other definitions for alights that I've seen before include "Gets down from, bus or train" , "Climbs down, from a bus say" , "Settles" , "Lands" , "Comes down or dismounts" .)