Some bits of a twisted strap (5)
I believe the answer is:
parts
'some bits' is the definition.
(I've seen this before)
'a twisted strap' is the wordplay.
'a twisted' is a reversal indicator.
'strap' written backwards gives 'PARTS'.
'of' is the link.
(Other definitions for parts that I've seen before include "Areas" , "Components of strap" , "Leaves" , "bits" , "Strap (anag.)" .)