Scratches heard in writer's passage? (6)
I believe the answer is:
clause
'writer's passage?' is the definition.
'clause' can be an answer for 'passage?' (thesaurus). I'm not sure about the 'writer's' bit.
'scratches heard' is the wordplay.
'scratches' becomes 'claws' (clawing is a kind of scratching).
'heard' shows a homophone (sound like).
'claws' sounds like 'CLAUSE'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for clause that I've seen before include "Proviso" , "Subdivision of a sentence" , "Not quite a full sentence" , "Joker, say" , "Separate section of a legal document" .)