Smallest division of winged insect (5)
I believe the answer is:
comma
'insect' is the definition.
(comma is a kind of insect)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for comma that I've seen before include ", which gives us pause" , "repeatedly found in lists" , "its use may be divisive" , "identifying place to breathe" , "Punctuation mark - butterfly" .)