Ace group with single many find dissolute (9)
I believe the answer is:
abandoned
'dissolute' is the definition.
(thesaurus)
'ace group with single many' is the wordplay.
'ace' becomes 'a'.
'group' becomes 'band' (band is a kind of group**).
'with' means one lot of letters go next to another.
'single' becomes 'one' (I've seen this before).
'many' becomes 'd'.
'a'+'band'+'one'+'d'='ABANDONED'
'find' is the link.
(Other definitions for abandoned that I've seen before include "Gave up - left - being completely irresponsible" , "Unrestrained" , "Deserted - shameless" , "No longer inhabited and left desolate" , "Forsook, left behind" .)