Appease teens, we compromise (7)
I believe the answer is:
sweeten
'appease' is the definition.
(I've seen this before)
'teens we compromise' is the wordplay.
'compromise' indicates an anagram (I've seen 'compromising' mean this (compromise can mean change)).
'teens'+'we'='teenswe'
'teenswe' is an anagram of 'SWEETEN'.
(Other definitions for sweeten that I've seen before include "Add sugar or honey" , "Make sugary or saccharine" , "Add, eg, sugar to" , "Make fresh" , "Make saccharine or honeyed" .)