Stage affected entrances (5)
I believe the answer is:
gates
'entrances' is the definition.
(I've seen this in another clue)
'stage affected' is the wordplay.
'affected' is an anagram indicator.
'stage' anagrammed gives 'GATES'.
(Other definitions for gates that I've seen before include "Stage is set for them to open and close" , "One of the founders of Microsoft" , "admission?" , "Doors" , "Hinged barriers serving as entrances" .)