Monster really will sacrifice wings to be human (3)
I believe the answer is:
err
'be human' is the definition.
(to err is human, to forgive divine)
'monster really will sacrifice wings' is the wordplay.
'ERR' is hidden within the letters.
But, I am not sure how this is indicated.
'to' is the link.
Can you help me to learn more?
(Other definitions for err that I've seen before include "Miscalculate" , "Miss the mark" , "Make a wrong move" , "do something you shouldn't" , "'To . . . is human, to forgive divine'" .)