LEAST STALE TEALS TALES LETS A TESLA STEAL SLATE STELA!-- Bravissimo or however the hell you spell it.

Or ir would be if it didn't stretch the implicit rules. If I were Will Shortz I'd eliminate it on the grounds of:

A) LETS A
       two words.

2) TALES LETS
       grammatically incorrect.

OK Faldo, you so smart you come up with one of you own.