Collected works by author abridged for festival (6,7)
I believe the answer is:
corpus christi
'festival' is the definition.
(I've seen this before)
'collected works by author abridged' is the wordplay.
I cannot quite see how this works, but
'works' could be 'corpus' (I've seen this before) and 'corpus' is located in the answer.
The remaining letters 'christi' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for corpus christi that I've seen before include "Church festival; Oxford college" , "Oxbridge college" , "Texan city: name shared by colleges at Oxford and Cambridge" , "Oxford or Cambridge college" .)