US inventor has no side, on reflection (6)
I believe the answer is:
edison
'us inventor' is the definition.
(Thomas Edison)
'no side on reflection' is the wordplay.
'on reflection' is a reversal indicator.
'no'+'side'='noside'
'noside' backwards is 'EDISON'.
'has' is the link.
(Other definitions for edison that I've seen before include "Inventor of the light bulb" , "The inventor is strangely onside" , "Thomas ......, famous American inventor" , "Thomas Alva ......, great American inventor" , "US inventor of phonograph, electric light etc." .)