Mature; cultivated (5)
I believe the answer is:
grown
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">mature</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">cultivated</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for grown that I've seen before include "increased in stature?" , "Raised; having got bigger" , "Fully developed" , "Big" , "Cultivated" .)