Graduate blessing monkey (6)
I believe the answer is:
baboon
'monkey' is the definition.
(baboon is a kind of monkey)
'graduate blessing' is the wordplay.
'graduate' becomes 'BA' (someone with a Bachelor of Arts degree).
'blessing' becomes 'boon' (synonyms).
'ba'+'boon'='BABOON'
(Other definitions for baboon that I've seen before include "clumsy uncouth person" , "Stupid person" , "Large primate" , "wild swinger?" , "Type of large monkey" .)