One coming in to cite holy writ, the result of division (8)
I believe the answer is:
quotient
'the result of division' is the definition.
(result of dividing one number by another)
'one coming in to cite holy writ' is the wordplay.
'one' becomes 'i' (Roman numeral).
'coming in to' means one lot of letters goes inside another.
'cite' becomes 'quote' (synonyms).
'holy writ' becomes 'nt' (abbreviation for New Testament).
'i' going into 'quote' is 'quotie'.
'quotie'+'nt'='QUOTIENT'
(Other definitions for quotient that I've seen before include "Not quite (anag) - ratio" , "Result of division (maths)" , "In maths, it's obtained by dividing one quantity by another" , "Ratio of two quantities to be divided" , "The Q in IQ" .)