Enthusiast to hang elaborate ornament (9)
I believe the answer is:
fandangle
'elaborate ornament' is the definition.
'enthusiast to hang' is the wordplay.
'enthusiast' becomes 'fan' (fan is a kind of enthusiast).
'to hang' becomes 'dangle' (dangling is a kind of hanging).
'fan'+'dangle'='FANDANGLE'
(Other definitions for fandangle that I've seen before include "Nonsense" , "Useless ornament" .)