Crossword Genius

Packers seen on the moon? (7)

Ross

I believe the answer is:

craters

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

'packers' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.

'on the moon?' is the wordplay.
I cannot really understand how this works, but
'on' could be 'at' (I've seen this in other clues) and 'at' is found in the answer.
This explanation may well be incorrect...

'seen' acts as a link.

Can you help me to learn more?

(Other definitions for craters that I've seen before include "Shell-holes" , "Depressions" .)

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.