Figure has Sumerian features (6)
I believe the answer is:
assume
'figure' is the definition.
(thesaurus)
'has sumerian features' is the wordplay.
'features' indicates a hidden word (I've seen 'featuring' mean this).
'ASSUME' is hidden in the letters of 'has sumerian'.
(Other definitions for assume that I've seen before include "Suppose - appropriate - feign - adopt" , "Take as true without proof" , "Accept as true without proof" , "Be arrogant" , "Guess" .)