No Pat, the 'clean break' is not part of Article 50. If a nation state decides to leave the EU, it must come to a 'Withdrawal Agreement'. Now commonly known as 'the Deal'. And absolutely, of course, the EU is going to make that deal as one sided as possible. Knowing that, the only real options are to drop out hard or ignore the referendum result.
Of course, the 'third way' is to re-run the referendum and many 'experts' have chewed that one to death and it does not seem to be on the cards.