I'll repeat a passage (5)
I believe the answer is:
aisle
'passage' is the definition.
(aisle can mean a path or passageway)
'i'll repeat a' is the wordplay.
I cannot really see how this works, but
'a' is within the answer.
The remaining letters 'isle' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for aisle that I've seen before include "channel" , "Way between seating areas" , "Passageway between seating areas" , "Divide in a church" , "Part of supermarket" .)