This is not a musical "clef" at all ...

Due to limitations on certain characters in the question box the question should read:

"Give and example of the roman à clef"

The answer:

Novel with a "key" ... a writing about real life with fiction undertones. Some famous figure, or even the author themselves are the "key" in the book.

the treble clef :)

The treble clef, which wraps around G on the staff.

The treble clef is also known as the 'g' clef. The bass clef is also known as the 'f' clef.

Violin music is written using the treble clef.