Cinema attendant, female, in ancient city (5)
I believe the answer is:
usher
'cinema attendant' is the definition.
(I've seen this before)
'female in ancient city' is the wordplay.
'female' becomes 'she' ('she' refers to a woman).
'in' indicates putting letters inside.
'ancient city' becomes 'ur' (ancient Sumerian city state).
'she' going inside 'ur' is 'USHER'.
(Other definitions for usher that I've seen before include "He shows people to their seats in theatre" , "Old teacher" , "pilot" , "Doorkeeper, escort" , "Person who shows one to a seat" .)