Crossword Genius

A key passage (5)

Ross

I believe the answer is:

aisle

'passage' is the definition.
(aisle is a kind of passage)

'a key' is the wordplay.
'key' becomes 'isle' (I've seen this before**).
'a'+'isle'='AISLE'

(Other definitions for aisle that I've seen before include "Passage between shelves in supermarket" , "way for prospective union members?" , "part of theatre?" , "Way between seat blocks" , "Part of a church" .)

I've seen this clue in The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.