Squandering (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">squandering</span>' is the definition.<br/ ><span class="explanation-format__explanation">('waste' can be a synonym of 'squander')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Another definition for wasting that I've seen is " Spending thoughtlessly".)
(Another definition for using up that I've seen is " Exhausting (resources)".)