Group of criminals (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">group of criminals</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gang that I've seen before include "Organized group of workmen" , "Group that works or plays together" , "Crew, band" , "Criminal mob" , "Group acting with common purpose" .)