Booth in the theater (5)
I believe the answer is:
edwin
'booth in the theater' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for edwin that I've seen before include "-- Hubble (astronomer)" , "Anglo-Saxon King" , "Northumbrian king" , "and 19: Dickensian character" , "and 21 Across: Dickens character" .)