Thespian (5)
'thespian' is the definition.
(synonyms)
This is all the clue.
(Other definitions for actor that I've seen before include "Dramatic artist" , "Stage-player" , "One in a play" , "Person performing on stage or screen" , "ham" .)
'thespian' is the definition.
(actress is a kind of thespian)
This is the entire clue.
(Other definitions for actress that I've seen before include "Recasts (anag) - performer" , "Female player" , "Theatrical female" , "I might work in Hollywood" , "eg Emma Thompson" .)