Fruit and vegetable, cold/hot (5)
I believe the answer is:
peach
'fruit' is the definition.
(peach is a kind of fruit)
'vegetable coldhot' is the wordplay.
'vegetable' becomes 'pea' (pea is a kind of vegetable).
'coldhot' becomes 'ch' (I can't justify this - if you can you should give a lot more credence to this answer).
'pea'+'ch'='PEACH'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for peach that I've seen before include "To accuse" , "Cheap (anag.)" , "Popular stone-fruit" , "Fruit with downy skin" , "Fruit - beauty" .)