Swindles; castles (5)
I believe the answer is:
rooks
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">swindles</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ >'<span class="explanation-format__original">castles</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ ></span>
(Other definitions for rooks that I've seen before include "Collective name for them is a parliament" , "Chess castles and birds" , "Large, crow-like birds" , "men on the board" , "Cheats" .)