Restaurant worker with perfect hair (8)
I believe the answer is:
waitress
'restaurant worker' is the definition.
(I've seen this before)
'with perfect hair' is the wordplay.
'with' becomes 'w' (abbreviation).
'perfect' becomes 'ai' (I've seen this in other clues).
'hair' becomes 'tress' (tress is a kind of hair**).
'w'+'ai'+'tress'='WAITRESS'
(Other definitions for waitress that I've seen before include "Female server" , "One serving at table" , "Woman serving meal" , "She serves at table" , "Restaurant worker" .)