There's resentment after I'm taken in by a friend (8)
I believe the answer is:
acrimony
'there's resentment' is the definition.
I can't tell whether this defines the answer.
'i'm taken in by a friend' is the wordplay.
'taken in by' means one lot of letters goes inside another.
'friend' becomes 'crony' (crony is a kind of friend).
'a'+'crony'='acrony'
'im' placed into 'acrony' is 'ACRIMONY'.
'after' is the link.
Can you help me to learn more?
(Other definitions for acrimony that I've seen before include "Angry and unpleasant feelings or words" , "Rancour, bad blood" , "Bitterness, ill feeling" , "Bad feeling" , "Bitter feeling" .)