Russian currency (6)
I believe the answer is:
rouble
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">russian currency</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 rouble that I've seen before include "Russian coin" , "Russian monetary unit" , "Currency of 13" , "9 Across currency" , "Russian bread" .)