Famously musical arts given backing by many a head of state (6)

I believe the answer is:

strads

I'm a little stuck... Click here to teach me more about this clue!

'famously musical' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'arts given backing by many a head of state' is the wordplay.
'given backing' says the letters should be written backwards.
'by' is a charade indicator (letters next to each other).
'many' becomes 'd'.
'a head of' indicates taking the first letters.
The first letter of 'state' is 's'.
'arts' back-to-front is 'stra'.
'stra'+'d'+'s'='STRADS'

Can you help me to learn more?

(Another definition for strads that I've seen is " instruments from Cremona".)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.