The most common and most likely answer to this crossword clue is the 4 letter word YELL
I've seen this crossword clue in The Times
Y
E
L
L
More clues leading to the result YELL
- Cowardly, ignoring old wife’s shout
- You will quaintly call out
- Being old-fashioned, you will cry
- You will scream
- Shout like coward, emitting 'Ow!'
- Colour seen in large part to be very loud
- Walk back without beginning to cry
- Shout rebounds within valley
- Ring wife to avoid hue and cry
- Shetland isle up in the valleys
Buddy explains!

The straight part
We know that "call out" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case call out = yell.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 YELL mean?
YELL noun- A shout.
- A phrase to be shouted.
- Shout; holler; make a loud sound with the voice.
- To convey by shouting
- To tell someone off (in a loud and angry manner)
- Dry (of cow)