Stupid person an arts graduate given advantage (6)
I believe the answer is:
baboon
'stupid person' is the definition.
(baboon can mean a foolish person)
'an arts graduate given advantage' is the wordplay.
'an arts graduate' becomes 'ba' (Bachelor of Arts).
'given' means one lot of letters go next to another.
'advantage' becomes 'boon' (both can mean a benefit or asset).
'ba'+'boon'='BABOON'
(Other definitions for baboon that I've seen before include "Type of large monkey" , "wild swinger?" , "Large long-nosed African or Asian monkey" , "Uncouth type" , "Ground-living primate" .)