Portion; component (5)
I believe the answer is:
piece
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">portion</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that piece is a type of portion)</span><br/ ><br/ >'<span class="explanation-format__original">component</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for piece that I've seen before include "Section; firearm" , "that may follow show after work party?" , "Musical work; bit" , "A bit of something" , "Musical composition" .)