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Very cold in talk-back. That's repulsive (4)

Ross

I believe the answer is:

icky

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

I don't understand how the rest of the clue works.

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(Other definitions for icky that I've seen before include "Nasty, unpleasant (colloq.)" , "Cloying -- repulsive" , "Very bad" , "Repulsive - distasteful" , "Revolting" .)

I've seen this clue in the Sydney Morning Herald.
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