Crossword Genius

Bits to fasten up (5)

Ross

I believe the answer is:

parts

'bits' is the definition.
(I've seen this before)

'fasten up' is the wordplay.
'fasten' becomes 'strap' (strapping is a kind of fastening).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'strap' reversed gives 'PARTS'.

'to' is the link.

(Other definitions for parts that I've seen before include "Leaves" , "Components of strap" , "bits" , "Strap (anag.)" , "Areas" .)

I've seen this clue in The Telegraph.
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