Don's family (4,6)
I believe the answer is:
cosa nostra
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">don's family</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cosa nostra that I've seen before include "Criminals" , "US crime syndicate with links to the Mafia" , "The Mob" , "Criminal element" , "criminal US group" .)