"Beauty is truth, truth beauty" poet
I believe the answer is:
keats
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">beauty is truth truth beauty poet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for keats that I've seen before include "To a Nightingale poet" , "Early 19th century poet" , "English odist" , "English poet, 1795-1821" , "English romantic poet, d. 1821" .)