Passage writer will read out (5)
I believe the answer is:
aisle
'passage' is the definition.
(aisle is a kind of passage)
'writer will read out' is the wordplay.
'writer' becomes 'i' (the person who is writing these clues).
'will' becomes 'll'.
'read out' shows a homophone (sound like).
'i'+'ll'='ill'
'ill' sounds like 'AISLE'.
(Other definitions for aisle that I've seen before include "that would-be bride hopes to make it up!" , "Part of supermarket" , "Passage between blocks of chairs" , "Divide in a church" , "Church walkway" .)