Spoken quietly (5,4)
I believe the answer is:
sotto voce
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spoken quietly</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 sotto voce that I've seen before include "Like subdued talking" , "on the quiet" , "In an undertone, from Italian" , "(Said) quietly" , "In an undertone from Italy" .)