Peripherals (3-3)
I believe the answer is:
add-ons
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">peripherals</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 add-ons that I've seen before include "Additions" , "Accessories" .)