Supreme Court quota (4)
I believe the answer is:
nine
'supreme court quota' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nine that I've seen before include "A number of worthies" , "Cat's lives? - the next clue?" , "Days Lady Jane 5 ac reigned" , "One's married partner" , "Square root of 81" .)