Very minor audible trickery (7)
I believe the answer is:
sleight
'trickery' is the definition.
(as in sleight of hand)
'very minor audible' is the wordplay.
'very minor' becomes 'slight' (slight can mean minor or unimportant).
'audible' shows a homophone (sound like).
'slight' is a homophone of 'SLEIGHT'.
(Other definitions for sleight that I've seen before include "Cunning action" , "craft" , "Tricky cunning" , "It's deceiving to the eye" , "distraction?" .)