Confined stranger tattoo producer (13)

I believe the answer is:

kettledrummer

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

'tattoo producer' is the definition.
The definition suggests a singular noun which matches the answer.

'confined stranger' is the wordplay.
'confined' becomes 'kettled' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'stranger' becomes 'rummer' (rum can mean strange).
'kettled'+'rummer'='KETTLEDRUMMER'

Can you help me to learn more?

(Another definition for kettledrummer that I've seen is " one's found in the kitchen".)

I've seen this clue in The Guardian.

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.