Dwindle, dry up (7)
I believe the answer is:
shrivel
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">dwindle</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">dry up</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for shrivel that I've seen before include "Wither from lack of water" , "Contract into wrinkles" , "Wither with loss of moisture" , "Desiccate" , "Wither, shrink" .)