Musical groups (5)
I believe the answer is:
bands
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">musical groups</span>' is the definition.<br/ ><span class="explanation-format__explanation">(band is a kind of musical group)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bands that I've seen before include "Musical groups" , "Groups playing popular music" , "Gangs" , "Pop groups" .)