Its residents live on eggs (7)
I believe the answer is:
anthill
'eggs' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for anthill that I've seen before include "lots of workers" , "Built-up colony" , "There's much work to be done here" , "Home for social workers?" , "Termite mound" .)