Three ways to put a button on (3)

I believe the answer is:

sew

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'three ways' is the definition.
(compass directions)

I cannot understand how the rest of the clue works.

(Other definitions for sew that I've seen before include "Do some needlework" , "Make stitches" , "Fasten with needle and thread" , "Use a needle and thread" , "Stitch with needle and thread" .)

I've seen this clue in the Evening Standard.

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