The most common and most likely answer to this crossword clue is the 4 letter word POUR
I've seen this crossword clue in The Daily Telegraph
P
O
U
R
More clues leading to the result POUR
- Old Jack’s swallowing egg – it’s painful on the windpipe
- Report unfortunate discharge
- Listened to “Hole in bucket“?
- Page of the Guardian — will you do it or shall I?
- Pseud’s heartless gush
- Have-nots sell love for university entrance. That’s service!
- Penny’s first of this group to be mother
- Be mother for the French
- Serve drinks for Parisian
- Rain hard in opening in the ear
Buddy explains!

The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does POUR mean?
POUR noun- The act of pouring.
- Something, or an amount, poured.
- A downpour, or flood of precipitation.
- To cause (liquid, or liquid-like substance) to flow in a stream, either out of a container or into it.
- To send out as in a stream or a flood; to cause (an emotion) to come out; to cause to escape.
- To send forth from, as in a stream; to discharge uninterruptedly.
- To flow, pass or issue in a stream; to fall continuously and abundantly.
- To rain hard.
- Of a beverage, to be on tap or otherwise available for serving to customers.
- To move in a throng, as a crowd.