Pinball palace (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pinball palace</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 arcade that I've seen before include "games area?" , "Gallery" , "Covered passage with shops on both sides" , "Covered passage of e.g. shops" , "Covered walk with shops" .)