Fix fault around resistance - that's clever (6)
I believe the answer is:
artful
'clever' is the definition.
('artful' can be similar in meaning to 'clever')
'fix fault around resistance' is the wordplay.
'fix' is an anagram indicator.
'around' is an insertion indicator.
'resistance' becomes 'r' (abbreviation).
'fault' anagrammed gives 'atful'.
'atful' enclosing 'r' is 'ARTFUL'.
'that's' is the link.
(Other definitions for artful that I've seen before include "Dickens boy, an . . . . . . Dodger" , "Cunning, wily" , "Oliver Twist's pal was an . . . . . . dodger" , "Clever like Dickens's Dodger" , "Clever, tricky" .)