Develop over time (7)
I believe the answer is:
gestate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">develop over time</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gestate that I've seen before include "carry child" , "Carry in the womb" , "Evolve, ripen" , "Develop (idea, foetus)" , "Develop over time" .)