Six times seven (5-3)
I believe the answer is:
forty-two
'six times seven' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for forty-two that I've seen before include "Douglas Adams' numerical Answer to Life, The Universe and Everything" , "Three fourteens" , "The answer to the Ultimate Question of Life, the Universe, and Everything (Hitchhikers Guide to the Galaxy)" .)