A “Hole-in-the-wall” diner? (7)
I believe the answer is:
termite
'diner?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for termite that I've seen before include "It lives on wood" , "Social type" , "Woodworm of warmer regions" , "Ant-like insect which destroys timber" , "Whitish antlike insect" .)