Advantage obtained from inspired genius (4)
I believe the answer is:
edge
'advantage' is the definition.
(edge is a kind of advantage)
'obtained from inspired genius' is the wordplay.
'obtained from' indicates a hidden word.
'EDGE' is hidden within 'inspired genius'.
(Other definitions for edge that I've seen before include "Creep" , "Excitement; boundary" , "Keenness" , "Periphery" , "Intense/striking quality" .)