Confront boost in cosmetic surgery (8)
I believe the answer is:
facelift
'cosmetic surgery' is the definition.
(I've seen this before)
'confront boost' is the wordplay.
'confront' becomes 'face' (synonyms).
'boost' becomes 'lift' (both can mean to steal).
'face'+'lift'='FACELIFT'
'in' is the link.
(Other definitions for facelift that I've seen before include "Renovation" , "plastic surgery" , "surgical treatment" , "Improved appearance" , "wrinkle treatment" .)