Secretly listens in on (bugs) (7)
I believe the answer is:
earwigs
'bugs' is the definition.
(I know this)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for earwigs that I've seen before include "Elongated insects" , "listens in furtively" , "Insect with pincers" , "Eavesdrops on the insects" , "Bugs" .)