It's hot and cold, one hears (6)
I believe the answer is:
chilli
'it's hot' is the definition.
I can't judge whether this definition defines the answer.
'cold one hears' is the wordplay.
'cold' becomes 'chilly' (I've seen this before).
'one hears' indicates a 'sounds like' (homophone) clue (I've seen 'hear' mean this).
'chilly' is a homophone of 'CHILLI'.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for chilli that I've seen before include "Hot stuff (though it sounds cold)" , "Pungent pod" , "Give up completely" , "Hot stuff (though sounding otherwise)" , "Burner" .)