Use void, shifty means to be deceptive (7)
I believe the answer is:
devious
'to be deceptive' is the definition.
(thesaurus)
'use void shifty' is the wordplay.
'shifty' indicates anagramming the letters.
'use'+'void'='usevoid'
'usevoid' anagrammed gives 'DEVIOUS'.
'means' is the link.
(Other definitions for devious that I've seen before include "Machiavellian, roundabout" , "Not straightforward, underhand" , "Cunning and deceitful" , "Scheming, underhand" , "Underhand, deceitful" .)