Whatever quantity (3)
I believe the answer is:
'whatever quantity' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for any that I've seen before include "One (unspecified)" , "One, some, every or all without specification" , "At all; in some degree" , "One, no matter which" , "A lot < ? Not a lot < -- some" .)