Crossword Genius

Maybe steam sauce that's designed to impress (5,8)

Ross

I believe the answer is:

human activity

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

'maybe steam' is the definition.
(I know that Steam is a musical work/composition)

I can't explain the remainder of the clue.

Can you help me to learn more?

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.