Virgin adopts endless regulation for treatment on foot (8)
I believe the answer is:
pedicure
'treatment on foot' is the definition.
(type of cosmetic treatment)
'virgin adopts endless regulation' is the wordplay.
'virgin' becomes 'pure' (synonyms).
'adopts' is an insertion indicator.
'endless' means to remove the last letter.
'regulation' becomes 'edict' (I've seen this before).
'edict' with its final letter taken off is 'edic'.
'pure' placed around 'edic' is 'PEDICURE'.
'for' is the link.
(Other definitions for pedicure that I've seen before include "Price due for car of the feet" , "Cosmetic foot treatment" , "cutting out corn etc" , "Beauty treatment for the feet" , "Care and treatment of the feet and toenails" .)