Fill a glass (4)
I believe the answer is:
pour
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fill a glass</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pour that I've seen before include "Cause to flow or rain heavily" , "16 [CATS AND DOGS]" , "Pelt - decant" , "Cause to flow as from pot to cup" , "Give out liquid" .)