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