Hurts again when one comes to (7)
I believe the answer is:
reaches
This clue is a double definition.
'hurts again' is the first definition.
('aches' can be a synonym for 'hurts' so perhaps 'reaches' is OK for 'hurts again')
'one comes to' is the second definition.
(I've seen this before)
'when' acts as a link.
(Other definitions for reaches that I've seen before include "Hands down" , "Bays" , "Arrives at" , "River stretches between bends" , "Makes contact with" .)