Asian ready to use the bathroom after sport (5)
I believe the answer is:
rupee
'asian ready' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'the bathroom after sport' is the wordplay.
'the bathroom' becomes 'pee' (I can't explain this - if you can you should believe this answer much more).
'after' says to put letters next to each other.
'sport' becomes 'RU' (rugby union).
'pee' put after 'ru' is 'RUPEE'.
'to use' acts as a link.
Can you help me to learn more?
(Other definitions for rupee that I've seen before include "Currency of the subcontinent" , "Indian currency unit" , "Currency of India, Pakistan and Bhutan" , "Indian bread" , "Lots of pies" .)