Calm operatic debut for Domingo? (7)

I believe the answer is:

placido

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

'domingo?' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'calm operatic debut' is the wordplay.
'calm' becomes 'placid' (synonyms).
'debut' indicates taking the first letters.
The first letter of 'operatic' is 'o'.
'placid'+'o'='PLACIDO'

'for' acts as a link.

Can you help me to learn more?

(Another definition for placido that I've seen is " -- Domingo, opera singer".)

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.