Sound system (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sound system</span>' is the definition.<br/ ><span class="explanation-format__explanation">(hi-fi is a kind of sound system)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hi-fi that I've seen before include "High fidelity" , "Good quality sound system, in short" , "High-quality sound equipment" , "Stereo" , "Good sound reproduction, in short" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sound system</span>' is the definition.<br/ ><span class="explanation-format__explanation">(stereo is a kind of sound system)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stereo that I've seen before include "Twin-channel sound" , "Tape recorder" , "Audio system, hi-fi" , "Record-player" , "System that gives a three-dimensional sound" .)