The most common and most likely answer to this crossword clue is the 7 letter word YELLING
I've seen this crossword clue in Financial Times
Y
E
L
L
I
N
G
Buddy explains!

The straight part
We know that "shouting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shouting = yelling.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 YELLING mean?
YELLING verb- Shout; holler; make a loud sound with the voice.
- To convey by shouting
- To tell someone off (in a loud and angry manner)
- The act of producing a yell.