Bloody wound for former pupil (3,3)
I believe the answer is:
old boy
'former pupil' is the definition.
(I've seen this before)
'bloody wound' is the wordplay.
'wound' indicates anagramming the letters (wound can mean twisted or turned around).
'bloody' anagrammed gives 'OLD BOY'.
'for' is the link.
(Other definitions for old boy that I've seen before include "Alumnus (with network)" , "I say, it's a former school chum" , "Male former pupil" , "Male ex-pupil" , "my dear chap!" .)