Move slowly forward, but not far? (4)

I believe the answer is:

inch

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

I don't understand the remainder of the clue.

(Other definitions for inch that I've seen before include "Crawl; imperial measurement" , "Fraction of a foot" , "One of a 2 down in a foot" , "Two point five four cm" , "One point 63380 th of a mile" .)

I've seen this clue in The Sun.

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