Injured, angry, upset, old (7)
I believe the answer is:
damaged
'injured' is the definition.
('damaged' is associated in meaning with 'injured')
'angry upset old' is the wordplay.
'angry' becomes 'mad' ('mad' can be similar in meaning to 'angry').
'upset' shows that the letters should be reversed in order.
'old' becomes 'aged' ('aged' can be similar in meaning to 'old').
'mad' back-to-front is 'dam'.
'dam'+'aged'='DAMAGED'
(Other definitions for damaged that I've seen before include "Hurt" , "Impaired" , "Sullied or harmed" , "Harmed, injured or spoiled" , "Marred" .)