Graduate claims to have changed vinegar (8)
I believe the answer is:
balsamic
'vinegar' is the definition.
(I've seen this before)
'graduate claims to have changed' is the wordplay.
I cannot really understand how this works, but
'graduate' could be 'ba' (someone with a Bachelor of Arts degree) and 'ba' is present in the answer.
an anagram of 'claims' is 'lsamic' which is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for balsamic that I've seen before include "Italian type of vinegar" , "BAs claim this strange type of vinegar" , "smelling of perfume" , "Concerned with healing" , "Variety of vinegar" .)