Crumbly cheese's matte finish partly making a comeback (5)
I believe the answer is:
'crumbly cheese's' is the definition.
'fetta' can be an answer for 'cheese's' (I have seen 'Greek cheese ' mean 'fetta' so perhaps 'cheese' could also mean 'fetta'). I am not sure about the 'crumbly' bit.
'matte finish partly making a comeback' is the wordplay.
'partly' indicates a hidden word (part of the clue is used).
'making a comeback' is a reversal indicator.
'attef' can be found hidden inside 'matte finish'.
'attef' written backwards gives 'FETTA'.
Can you help me to learn more?
(Another definition for fetta that I've seen is " Greek cheese".)