Composer writing feature about opus (6)
I believe the answer is:
chopin
'composer' is the definition.
(Chopin is an example)
'feature about opus' is the wordplay.
'feature' becomes 'chin' (chin is a kind of feature).
'about' is an insertion indicator.
'opus' becomes 'op'.
'chin' enclosing 'op' is 'CHOPIN'.
'writing' is the link.
(Other definitions for chopin that I've seen before include "Frederic . . . . . ., great Polish composer-pianist" , "Great Polish composer of phonic kind" , "See 10" , "Frederic ......, 19th century Polish composer, mostly for piano" , "Composer of mainly piano works" .)