Packers seen on the moon? (7)
I believe the answer is:
craters
'packers' is the definition.
Although both the answer and definition are plural nouns, I don't understand how one could define the other.
'on the moon?' is the wordplay.
I cannot quite see how this works, but
'on' could be 'at' (I've seen this in other clues) and 'at' is present in the answer.
This explanation may well be incorrect...
'seen' is the link.
Can you help me to learn more?
(Other definitions for craters that I've seen before include "Shell-holes" , "Depressions" .)