Some stage whispers (6)
I believe the answer is:
asides
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">some stage whispers</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 asides that I've seen before include "Daises (anag.)" , "Remarks to an audience" , "not everyone hears them" , "Undertones on stage" , "Words spoken through side of mouth, not for all to hear" .)