Process (food) (6)
I believe the answer is:
digest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">process food</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 digest that I've seen before include "Long walk, itinerant person" , "Synopsis" , "publication" , "Take in (information or food)" , "Periodical summarizing the news" .)