Mitch Miller's instrument (4)
I believe the answer is:
oboe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mitch miller's instrument</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oboe that I've seen before include "Source of music" , "issuer of notes" , "Double-reed woodwind" , "Woodwind instrument of treble pitch" , "Double-reed wind instrument" .)