Revolutionary and monster becoming accessories (10)
I believe the answer is:
Here is my best explanation:
'accessories' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe there's an association between them I don't understand?
'revolutionary and monster' is the wordplay.
'revolutionary' indicates anagramming the letters.
'andmonster' anagrammed gives 'ADORNMENTS'.
'becoming' acts as a link.