Figure fractionally over the line? (9)
I believe the answer is:
numerator
'line?' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for numerator that I've seen before include "quantity of parts?" , "Upper part of fraction" , "Top half of 1/2 , for example" , "Figure going over a line" , "the superior figure" .)