Stage of metamorphosis (4)
I believe the answer is:
pupa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stage of metamorphosis</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 pupa that I've seen before include "Developing butterfly" , "middle stage" , "not yet adult" , "Phase of insect life" , "So peacock may have appeared" .)