Crossword Genius

Parts of contests about a set of books (10)

Ross

I believe the answer is:

components

'parts' is the definition.
(a component is part of something)

'contests about a set of books' is the wordplay.
'contests' becomes 'comps' (short for competitions).
'about' indicates putting letters inside.
'a' becomes 'one'.
'set of books' becomes 'NT' (New Testament).
'one'+'nt'='onent'
'comps' placed around 'onent' is 'COMPONENTS'.

'of' is the link.

(Another definition for components that I've seen is " Parts".)

I've seen this clue in The Independent.
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