Two are more unfeeling (4,6)
I believe the answer is:
even number
'two are more' is the definition.
I know nothing about this answer so I can't tell whether this works.
'unfeeling' is the wordplay.
I cannot really see how this works, but
'unfeeling' could be 'numb' (synonyms) and 'numb' is located in the answer.
The remaining letters 'evener' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for even number that I've seen is " A digit".)