Winter driving hazard (3)

I think it could be either:

Which length description are you looking for?:

3,4

ice

'winter driving hazard' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ice that I've seen before include "Top cake" , "dessert" , "Diamond" , "Diamonds (sl)" , "Constituent of 2dn" .)

I've seen this clue in The Sun.

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