Curry gets cold, very cold (6)
I believe the answer is:
baltic
'very cold' is the definition.
(baltic can informally mean very cold)
'curry gets cold' is the wordplay.
'curry' becomes 'balti'.
'gets' says to put letters next to each other.
'cold' becomes 'c' (eg on taps).
'balti'+'c'='BALTIC'
(Other definitions for baltic that I've seen before include "Almost land-locked sea of NE Europe" , "The Sea around Scandinavia" , "Near-landlocked sea of N Europe" , "N European sea" , "Scandinavian sea" .)