Milanese opera house (2,5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">milanese opera house</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for la scala that I've seen before include "Milanese opera house" , "A Callas may find way to Milan's famous opera house" , "where Toscanini was musical director" , "noted venue?" , "music centre" .)
(Other definitions for lascala that I've seen before include "music venue" , "theatre" .)