Make aware of pain at the back after shot in the leg (9)
I believe the answer is:
enlighten
'make aware' is the definition.
(I've seen this before)
'pain at the back after shot in the leg' is the wordplay.
'at the back' says to take the final letters (the letter at the back).
'after' says to put letters next to each other.
'shot' indicates anagramming the letters.
The final letter of 'pain' is 'n'.
'in'+'the'+'leg'='intheleg'
'intheleg' anagrammed gives 'enlighte'.
'n' put after 'enlighte' is 'ENLIGHTEN'.
'of' is the link.
(Other definitions for enlighten that I've seen before include "Instruct" , "Edify" , "Brief" , "Apprise" , "Provide illumination" .)