Very cold-sounding wall decoration (6)
I believe the answer is:
frieze
'wall decoration' is the definition.
(architectural feature)
'very cold-sounding' is the wordplay.
I cannot quite understand how this works, but
'sounding' could be 'e' (I've seen this in other clues) and 'e' is present in the answer.
The remaining letters 'frize' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for frieze that I've seen before include "Decorative horizontal band" , "Decorator's band" , "Artistic band" , "Part of temple wall" , "Sculptured band between architrave and cornice" .)