Some touches that hurt! (4)
I believe the answer is:
ouch
'that hurt' is the definition.
(I've seen this before)
'some touches' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'OUCH' is hidden in the letters of 'touches'.
(Other definitions for ouch that I've seen before include "Pained cry" , "sounds painful" , "that hurts!" , "Exclamation of pain - that hurt!" , "Pained sound" .)