Hospitality worker with first-rate hair (8)
I believe the answer is:
waitress
'hospitality worker' is the definition.
(I know that waitress is a type of hospitality worker)
'with first-rate hair' is the wordplay.
'with' becomes 'w' (short for with).
'first rate' becomes 'AI' (resembles A1, old-fashioned slang for very good).
'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" , "Cafe attendant" , "Server at table" , "She serves at table" , "Restaurant worker" .)