Noise complaint expanded (5)
I believe the answer is:
grown
'expanded' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'noise complaint' is the wordplay.
'noise' shows a homophone (sound like).
'complaint' becomes 'groan' (to groan is to complain about something).
'groan' is a homophone of 'GROWN'.
Can you help me to learn more?
(Other definitions for grown that I've seen before include "Raised; having got bigger" , "Matured" , "increased in stature?" , "Increased; raised" , "Fully developed" .)