Insignificant people (5,3)
I believe the answer is:
small fry
'insignificant people' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for small fry that I've seen before include "people of little importance" , "young children" , "Not the full English breakfast" , "Unimportant people or baby fish" , "Young fish" .)