Crossword Genius

Extremely eager and interested in variety. Ask us trade names (2,4,2,7)

Ross

I believe the answer is:

as keen as mustard

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

'extremely eager and interested in variety ask us trade names' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'extremely eager and interested in variety ask us trade names' is the wordplay.
'ask us trade names' can be anagrammed to 'AS KEEN AS MUSTARD'.
However, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for as keen as mustard that I've seen before include "anxious?" , "very passionate?" , "How dressing for dinner may make you" .)

I've seen this clue in the Sydney Morning Herald.
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.