Nothing's flipping free from dishonesty in business (6)
I believe the answer is:
affair
'business' is the definition.
(thesaurus)
'nothing's flipping free from dishonesty' is the wordplay.
'nothing' becomes 'fa'.
'flipping' says the letters should be written in reverse.
'free from dishonesty' becomes 'fair'.
'fa' reversed gives 'af'.
'af'+'fair'='AFFAIR'
'in' is the link.
(Other definitions for affair that I've seen before include "Raffia (anag)" , "A fling (or something more serious?)" , "Romantic relationship, perhaps illicit" , "Amorous liaison" , "scandal" .)