Thirty odd pieces of copy evolved into multi-faceted work (8)
I believe the answer is:
triptych
'multi-faceted work' is the definition.
(a triptych is a work in three parts)
'thirty odd pieces of copy evolved' is the wordplay.
'odd pieces of' means one should take alternating letters.
'evolved' is an anagram indicator (the order of letters changes or evolves).
The alternating letters of 'copy' are 'cp'.
'thirty'+'cp'='thirtycp'
'thirtycp' is an anagram of 'TRIPTYCH'.
'into' acts as a link.
(Other definitions for triptych that I've seen before include "Three-part painting" , "Three-panelled picture" , "Picture with three panels" , "Three-panel artwork" , "panel" .)