Injured through climbing regularly (4)
I believe the answer is:
hurt
'injured' is the definition.
('hurt' can be similar in meaning to 'injured')
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for hurt that I've seen before include "Cause pain to" , "Injured" , "Injure - injury" , "Ache" , "Feel pain" .)