Inventor with zero arrogance taken aback (6)
I believe the answer is:
edison
'inventor' is the definition.
(I know that Edison is a inventor)
'with zero arrogance taken aback' is the wordplay.
'with' is a charade indicator (letters next to each other).
'zero' becomes 'no' (similar in meaning).
'arrogance' becomes 'side' (I've seen this before).
'taken aback' is a reversal indicator.
'no' put next to 'side' is 'noside'.
'noside' back-to-front is 'EDISON'.
(Other definitions for edison that I've seen before include "Inventor of the carbon filament lamp, d. 1931" , "The inventor is strangely onside" , "inventive sort" , "Incandescent light inventor" , "Thomas Alva ......, great American inventor" .)