amelioration (11)
(Other definitions for upturn that I've seen before include "Boom after a bust" , "Recovery" , "economic improvement" , "Improved trend in business or fortune" , "Improvement, better trend in business" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">amelioration</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for improvement that I've seen before include "Act of making better" , "Upgrade" , "recovery" , "A change for the better" , "upgrading" .)