Doesn't 10ac require "crypto" to be used twice,once as part of the def and again in the wordplay. I don't buy "representation" alone as the definition.
And although there's a good deal of discussion about 14ac no one has queried how "one used" equates to word 1 of the solution.
Perhaps someone could explain?
And the "l" for Lambert seems to be from the "anything beginning with ? will do" school of setting.