Computer (6)
I believe the answer is:
laptop
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">computer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(laptop is a part of computer)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for laptop that I've seen before include "Kind of computer" , "Some work on this" , "Aid for businessman" , "Small computer" , "device?" .)