The nudes dancing round the two big-heads are cold-shouldered (7)
I believe the answer is:
snubbed
'are cold-shouldered' is the definition.
(I've seen this before)
'the nudes dancing round the two big-heads' is the wordplay.
'dancing' indicates anagramming the letters.
'round' is an insertion indicator.
'the two' shows that letters should be duplicated.
'heads' indicates taking the first letters.
The first letter of 'big' is 'b'.
'nudes' anagrammed gives 'snued'.
'b' duplicated is 'bb'.
'snued' going around 'bb' is 'SNUBBED'.
(Other definitions for snubbed that I've seen before include "Rebuffed, insulted" , "Given the cold shoulder" , "Cold-shouldered" , "Reproved" , "affected by cruel cuts" .)