Passage your compiler will read aloud (5)
I believe the answer is:
aisle
'passage' is the definition.
(aisle is a kind of passage)
'your compiler will read aloud' is the wordplay.
'your compiler will' becomes 'I'll' ('I will', referring to the compiler of this puzzle).
'read aloud' indicates a 'sounds like' (homophone) clue.
'ill' sounds like 'AISLE'.
(Other definitions for aisle that I've seen before include "Passage between rows of seats" , "Supermarket section" , "that would-be bride hopes to make it up!" , "way to the altar?" , "Divide in a church" .)