Random net used as decoration (9)
I believe the answer is:
adornment
'decoration' is the definition.
(adornment is a kind of decoration)
'random net used' is the wordplay.
'used' is an anagram indicator.
'random'+'net'='randomnet'
'randomnet' is an anagram of 'ADORNMENT'.
'as' is the link.
(Other definitions for adornment that I've seen before include "decorating" , "Embellishment" , "Making elaborate" , "Ornamentation" , "form of beautification?" .)