Vegetable from Spain, prepared cold and hot (7)
I believe the answer is:
spinach
'vegetable' is the definition.
(spinach is a kind of vegetable)
'spain prepared cold and hot' is the wordplay.
'prepared' indicates anagramming the letters.
'cold' becomes 'c' (eg on taps).
'and' is a charade indicator (letters next to each other).
'hot' becomes 'h'.
'spain' is an anagram of 'spina'.
'spina'+'c'+'h'='SPINACH'
'from' acts as a link.
(Other definitions for spinach that I've seen before include "leaves on plate?" , "Popeye the Sailor's favourite vegetable" , "Popeye's vegetable" , "Dark green vegetable" , "Leaf vegetable" .)