A number argue after female receives another stroke on bottom (5)
I believe the answer is:
eight
'a number' is the definition.
(eight is a kind of number)
I cannot understand how the rest of the clue works.
(Other definitions for eight that I've seen before include "Number that figures in ice-skating?" , "A number, sounds like swallowed" , "One less than nineteen across" , "Two fours" , "Oxford crew, perhaps?" .)