Good person taken in by criminal with social worker's uniform (8)
I believe the answer is:
constant
'uniform' is the definition.
(thesaurus)
'good person taken in by criminal with social worker's' is the wordplay.
'good person' becomes 'st' (saint).
'taken in by' indicates putting letters inside.
'criminal' becomes 'con' (abbreviation for 'convict'**).
'with' means one lot of letters go next to another.
'social worker' becomes 'ant' (I've seen this before).
'con'+'ant'='conant'
'st' going inside 'conant' is 'CONSTANT'.
(Other definitions for constant that I've seen before include "Remaining the same" , "without changes" , "Recurring and unchanging" , "Stable" , "Always - faithful" .)