British house plastered (6)
I believe the answer is:
blotto
'plastered' is the definition.
(synonyms)
'british house' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'house' becomes 'lotto' (I've seen this before).
'b'+'lotto'='BLOTTO'
(Other definitions for blotto that I've seen before include "Bombed" , "As one plastered" , "Totally drunk" , "Unconscious from drink" , "Tight" .)