Simple tune from Hairspray (3)
I believe the answer is:
air
'simple tune' is the definition.
(I've seen this before)
'from hairspray' is the wordplay.
'from' says the answer is hidden in the clue.
'AIR' is hidden in the letters of 'hairspray'.
(Other definitions for air that I've seen before include "Light wind; song" , "Atmosphere (of a melody?)" , "Substance breathed in" , "It's a mixture mainly of oxygen and nitrogen" , "what emerges from singer's lungs?" .)