Nurses undressed in Broadway show (5)
I believe the answer is:
annie
'broadway show' is the definition.
(Annie is a Broadway musical)
'nurses undressed' is the wordplay.
'nurses' becomes 'nannies' ('nanny' can be a synonym of 'nurse').
'undressed' says to take the centre (the word removes the letters which clothe it).
The middle letters of 'nannies' are 'ANNIE'.
'in' acts as a link.
(Other definitions for annie that I've seen before include "Miss Laurie" , "said to carry a gun" , "1977 Broadway musical" , "Oakley, Laurie or Hall" , "-- Lennox, singer" .)