Insect wasn’t loud? (4)

I believe the answer is:

wasp

'insect' is the definition.
(wasp is a kind of insect)

I don't understand the remainder of the clue.

(Other definitions for wasp that I've seen before include "Influential American" , "Insect often irritating in summer" , "Social worker" , "Insect with a sting in its tail" , "Insect with a formidable sting" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app