Injured wise man taken in by father (7)
I believe the answer is:
damaged
'injured' is the definition.
('damaged' is associated in meaning with 'injured')
'wise man taken in by father' is the wordplay.
'wise man' becomes 'mage' (I've seen this before).
'taken in by' means one lot of letters goes inside another.
'father' becomes 'dad' (dad is a kind of father).
'mage' placed inside 'dad' is 'DAMAGED'.
(Other definitions for damaged that I've seen before include "in poor condition" , "Harmed, injured or spoiled" , "Impaired" , "Marred" , "Sullied or harmed" .)