Graduate attired in leather brewed drink (6,3)
I believe the answer is:
herbal tea
'drink' is the definition.
(herbal tea is a kind of drink)
'graduate attired in leather brewed' is the wordplay.
'graduate' becomes 'BA' (someone with a Bachelor of Arts degree).
'attired in' means one lot of letters goes inside another.
'brewed' indicates anagramming the letters.
'leather' with letters rearranged gives 'herltea'.
'ba' put inside 'herltea' is 'HERBAL TEA'.
(Other definitions for herbal tea that I've seen before include "Plant infusion" , "hot drink" , "liquid concoction" , "healthy drink" .)