The most common and most likely answer to this crossword clue is the 4 letter word BAWL
I've seen this crossword clue in The Times
B
A
W
L
More clues leading to the result BAWL
- Blubber in round mass taken from sound
- Every so often, bear will cry loudly
- Cry loudly in rough fight when resistance fails
- Shout at airline going to St Lucia
- Shout and dance, say
- Cry from women in party rejected
- Loud cry as announcement of delivery
- Sob, putting end of thumb on sharp tool
- Barney Rubble at first has left blubber
- Cry ‘Ball!’
Buddy explains!

The straight part
We know that "cry loudly" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cry loudly = bawl.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 BAWL mean?
BAWL noun- A loud, intense shouting or wailing.
- To shout or utter in a loud and intense manner.
- To wail; to give out a blaring cry.