Manic bee spoiled atmosphere (8)
I believe the answer is:
ambience
'atmosphere' is the definition.
(I've seen this before)
'manic bee spoiled' is the wordplay.
'spoiled' is an anagram indicator.
'manic'+'bee'='manicbee'
'manicbee' anagrammed gives 'AMBIENCE'.
(Other definitions for ambience that I've seen before include "Aura (of a place)" , "Mood of place" , "Surrounding atmosphere" , "Environment, surroundings" , "Environment or atmosphere" .)