Undeveloped (6)
I believe the answer is:
latent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">undeveloped</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for latent that I've seen before include "There but not yet effective" , "Hidden (potential)" , "'Hidden, undeveloped (6)'" , "Potential not realised" , "Hidden (talent)" .)