The most common and most likely answer to this crossword clue is the 7 letter word CREATED
I've seen this crossword clue in The Daily Telegraph
C
R
E
A
T
E
D
Buddy explains!

The straight part
We know that "Made a fuss" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case made a fuss = created.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 CREATED mean?
CREATED verb- To bring into existence; (sometimes in particular:)
- To cause, to bring (a non-object) about by an action, behavior, or event, to occasion.
- To confer or invest with a rank or title of nobility, to appoint, ordain or constitute.
- To be or do something creative, imaginative, originative.
- In theatre, to be the first performer of a role; to originate a character.
- To make a fuss, complain; to shout.