Is it keen to help you enjoy your ham? (7)

I believe the answer is:

mustard

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

But I can't explain it at all! Could you help me understand?

(Other definitions for mustard that I've seen before include "Hot condiment" , "Yellow sauce" , "leading performer in wet conditions" , "Standard of keenness" , "Yellow paste as condiment - very keen" .)

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.