Dodgy dealer goes in back way for sewing machine parts (8)
I believe the answer is:
treadles
'sewing machine parts' is the definition.
(old sewing machines were powered by treadles)
'dodgy dealer goes in back way' is the wordplay.
'dodgy' indicates an anagram.
'goes in' indicates putting letters inside.
'back' is a reversal indicator.
'way' becomes 'st' (abbreviation for street).
'st' in reverse letter order is 'ts'.
'dealer' with letters rearranged gives 'readle'.
'readle' put into 'ts' is 'TREADLES'.
'for' acts as a link.
(Other definitions for treadles that I've seen before include "Levers operated with the foot" , "Machine parts" .)