Sewing material (6)

I think it could be either:

Which length description are you looking for?:

thread

(Other definitions for thread that I've seen before include "Subject" , "Connecting line" , "Strand of, eg, cotton" , "'Strand of cotton, silk etc (6)'" , "What sewer takes" .)

I've seen this clue in the USA Today, the Evening Standard and The Mirror.

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