Freshen (5)
I believe the answer is:
renew
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">freshen</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that freshen is a more specific form of renew)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for renew that I've seen before include "Make afresh" , "Reform" , "Take up again" , "Repeat for next year" , "modernise" .)