In Mank (2020), Joe calls Mank, who being massaged by a lady.

Joe: I hear you're hunting dangerous game. Word on the street is radio's golden boy wants to go toe-to-toe with Willie Hearst, and you're helping in the kitchen.

“Radio boy” refers to Welles, who — before "Citizen Kane" — made a name for himself as a radio and theater actor-director in his 20s.

What "kitchen" is Joe referring to?

In Mank (2020), Joe calls Mank, who is being massaged by a lady.

Joe: I hear you're hunting dangerous game. Word on the street is radio's golden boy wants to go toe-to-toe with Willie Hearst, and you're helping in the kitchen.

“Radio boy” refers to Welles, who — before Citizen Kane — made a name for himself as a radio and theater actor-director in his 20s.

What "kitchen" is Joe referring to?