Stage of decomposed cattle hair (10)
I believe the answer is:
theatrical
'stage' is the definition.
(thesaurus)
'decomposed cattle hair' is the wordplay.
'decomposed' indicates anagramming the letters.
'cattle'+'hair'='cattlehair'
'cattlehair' with letters rearranged gives 'THEATRICAL'.
'of' acts as a link.
(Other definitions for theatrical that I've seen before include "overdramatic" , "Artificial and exaggerated" , "Stagy" , "Showbiz" , "Excessively dramatic" .)