Grew to be or developed into something (6)
I believe the answer is:
became
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">grew to be</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">developed into something</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for became that I've seen before include "Got to be" , "Underwent a change" , "Turned into" , "Developed into something" , "Changed into" .)