Become less cold? What's wrong with that? (4)
I believe the answer is:
thaw
'become' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Maybe there's an association between them I don't understand?
'less cold? what's wrong with that?' is the wordplay.
'what' can be anagrammed to 'THAW'.
Though, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for thaw that I've seen before include "(Of snow) start to melt" , "Morse actor; melt" , "John, once regularly on TV" , "when the temperature rises?" , "Become warmer" .)