Dull people (5)
I believe the answer is:
bores
'dull people' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bores that I've seen before include "Drills or wearies" , "Tedious people or drills" , "Dull tedious talkers" , "Makes a hole with a pointed tool" .)