Flour producer (6)
I believe the answer is:
miller
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flour producer</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 miller that I've seen before include "Arthur -, Death of a Salesman author" , "Grain-grinder" , "Producer of flour" , "Grain grinder" , "Dusty food processor" .)