Crossword Genius

Act badly, giving order in pizzeria? (3,2,2)

Ross

I believe the answer is:

ham it up

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

'act badly' is the definition.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for ham it up that I've seen is " Overact".)

I've seen this clue in The Telegraph.
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.