Uproar in opium den man resolved (11)
I believe the answer is:
pandemonium
'uproar' is the definition.
(I've seen this before)
'opium den man resolved' is the wordplay.
'resolved' indicates anagramming the letters.
'opium'+'den'+'man'='opiumdenman'
'opiumdenman' anagrammed gives 'PANDEMONIUM'.
'in' acts as a link.
(Other definitions for pandemonium that I've seen before include "State of chaos" , "Chaos and confusion" , "havoc" , "Tumultuous uproar" , "Bedlam" .)