Consumption, ingestion (6)
I believe the answer is:
eating
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">consumption</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that consumption is a type of consumption)</span><br/ ><br/ >'<span class="explanation-format__original">ingestion</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that eating is a type of ingestion)</span><br/ ><br/ ></span>
(Other definitions for eating that I've seen before include "Putting away" , "at breakfast?" , "Having supper?" , "Consuming food" , "Ingestion" .)