Hawthorn (3)
I believe the answer is:
may
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hawthorn</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that may is a type of hawthorn)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for may that I've seen before include "Girl's name; 10 ac (anag.)" , "Fifth month" , "Time" , "Spring" , "Has permission" .)