Passages mid-way from West Indies, for example (6)

I believe the answer is:

aisles

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

I don't understand the rest of the clue.

(Other definitions for aisles that I've seen before include "Lassie in church pathways" , "Pathways in a church (6)" , "Spaces between seats" , "Total disorder" , "Church corridors for lassie" .)

I've seen this clue in the Irish Times.

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