Crossword Genius

They nibble a slice of ham with something cold (4)

Ross

I believe the answer is:

mice

I'm a little stuck... Click here to teach me more about this clue!

'they' is the definition.
Both the answer and definition are plural nouns.
Maybe they are linked in a way I don't understand?

'nibble a slice of ham with something cold' is the wordplay.
I cannot really understand how this works, but
'cold' could be 'ice' (I've seen this before) and 'ice' is found in the answer.
A single letter 'm' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for mice that I've seen before include "people lacking character" , "They'll play when the cat's away" , "shy people" , "Blind group" , "Animals (contrasted with men)" .)

I've seen this clue in the Evening Standard.
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