Crossword Genius

One who feels the heat for one who feels the cold (7)

Ross

I believe the answer is:

sweater

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

'heat for one who feels the cold' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

'one who feels the' is the wordplay.
I cannot quite see how this works, but
'one' could be 'a' (a thing is one thing) and 'a' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
The remaining letters 'sweer' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for sweater that I've seen before include "Jumper (7)" , "A present from Mum!" , "slave-driver" , "Long-sleeved pullover" , "Woolly" .)

I've seen this clue in The Globe and Mail.
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