Time of blunter arguments (3)
I believe the answer is:
era
'time' is the definition.
(era is a kind of time)
'of blunter arguments' is the wordplay.
'of' says the answer is hidden in the clue.
'ERA' is hidden in the letters of 'blunter arguments'.
(Other definitions for era that I've seen before include "Long period of time" , "Long stretch" , "Geological period" , "Characteristic period" , "Age of importance" .)