Someone mending a pipe (5)

I believe the answer is:

sewer

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'pipe' is the definition.
(I know that sewer is a type of drain)

I can't explain the remainder of the clue.

(Other definitions for sewer that I've seen before include "One plying needle; drain" , "Pipe for carrying away waste matter" , "Channel to carry away waste water and matter" , "Large pipe for carrying waste matter" , "One stitching - discharge channel" .)

I've seen this clue in The Globe and Mail.

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