Edges on specific frilled collar for back of neck (6)
I believe the answer is:
scruff
'back of neck' is the definition.
(informal term for the back of someone's neck)
'edges on specific frilled collar' is the wordplay.
'edges on' says to hollow out the word (remove centre letters).
'frilled collar' becomes 'ruff' (I've seen this before).
'specific' with its centre removed is 'sc'.
'sc'+'ruff'='SCRUFF'
'for' is the link.
(Other definitions for scruff that I've seen before include "One hardly washing" , "Nape; untidy type" , "Untidy person - nape of neck" , "Part of neck" , "Unkempt individual" .)