Roll up hair length (4)

I believe the answer is:

furl

'roll up' is the definition.
('furl' can be a synonym of 'roll up')

'hair length' is the wordplay.
'hair' becomes 'fur' (fur is a kind of hair).
'length' becomes 'l'.
'fur'+'l'='FURL'

(Other definitions for furl that I've seen before include "Roll up, a flag say" , "Roll up neatly" .)

I've seen this clue in The Times.

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