Crossword Genius

Book fighter, third of eight, odd number? (7,4)

Ross

I believe the answer is:

novelty song

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'odd number?' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'book fighter third of eight' is the wordplay.
'book' becomes 'novel' (novel is a kind of book).
'fighter' becomes 'tyson' (US boxer Mike Tyson).
'third of eight' becomes 'g' (vrd letter of 'eight').
'novel'+'tyson'+'g'='NOVELTY SONG'

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