A hotel in marble will not remain too cold (4)
I believe the answer is:
thaw
'not remain too cold' is the definition.
I can't tell whether this definition defines the answer.
'a hotel in marble' is the wordplay.
'a hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'in' means one lot of letters goes inside another.
'marble' becomes 'taw' (taw is a kind of marble).
'h' going into 'taw' is 'THAW'.
'will' is the link.
Can you help me to learn more?
(Other definitions for thaw that I've seen before include "Become more friendly" , "Become friendlier; melt" , "(Of ice/snow) melt" , "when the temperature rises?" , "Unfreeze, defrost" .)