Cropped up (6)

I think it could be either:

Which length description are you looking for?:

arisen

'cropped up' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for arisen that I've seen before include "(Has) cropped up" , "Gone up" , "Sprung up" , "It's appeared" , "Up on the rocks" .)

I've seen this clue in The Independent.

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