Cold – it's often covered in ice! (11)

I believe the answer is:

standoffish

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

I don't understand the remainder of the clue.

(Other definitions for standoffish that I've seen before include "Unfriendly" , "Reserved, aloof" , "Cold" , "Distant" , "like a half of rugby?" .)

I've seen this clue in The Everyman puzzle in The Observer.

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