Painful cut, I hear (4)
I believe the answer is:
sore
'painful' is the definition.
(similar in meaning)
'cut i hear' is the wordplay.
'cut' becomes 'saw' (sawing is a kind of cutting).
'i hear' shows a homophone (sound like).
'saw' sounds like 'SORE'.
(Other definitions for sore that I've seen before include "Hurtful to the touch, like rose" , "To be very old" , "Hurt" , "Aggrieved" , "Hurting, painful" .)