Sachet for drink (3,3)
I believe the answer is:
tea bag
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sachet for drink</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 tea bag that I've seen before include "Small sack for a brew-up" , "One for the pot" , "Sachet to put in pot" , "wherewithal for a drink" , "Beverage in an individual serving" .)