Measure chin roughly (4)

I believe the answer is:

inch

'measure' is the definition.
(inch is a unit of length)

'chin roughly' is the wordplay.
'roughly' indicates anagramming the letters.
'chin' anagrammed gives 'INCH'.

(Other definitions for inch that I've seen before include "She led the Iceni; bade ciao (anag.)" , "Measure - small island - move slowly" , "0.08333 of a foot" , "Progress slowly" , "Scottish island: unit of length" .)

I've seen this clue in The Irish Times.

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