Bits of text corridors (8)

I believe the answer is:

passages

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'corridors' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for passages that I've seen before include "Sections of a text" , "Corridors, ways through" , "parts of text" , "Paths between buildings" , "Narrow streets or routes" .)

I've seen this clue in the Sydney Morning Herald.

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