I got mixed up with rum lot in trouble (7)
I believe the answer is:
turmoil
'trouble' is the definition.
(thesaurus)
'i got mixed up with rum lot' is the wordplay.
'got mixed up with' indicates an anagram.
'rum'+'lot'='rumlot'
'i' anagrammed with 'rumlot' gives 'TURMOIL'.
'in' acts as a link.
(Other definitions for turmoil that I've seen before include "Chaos" , "Wild disorder" , "Sturm und Drang" , "Disquiet" , "upset" .)