Card game for three
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">card game for three</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 skat that I've seen before include "Three-handed card game" , "dropping" , "game of cards" .)