Maybe they have shaken north's pride (5,6)
I believe the answer is:
third person
'maybe they' is the definition.
('they' is a third person pronoun)
'shaken north's pride' is the wordplay.
'shaken' indicates anagramming the letters.
'norths'+'pride'='northspride'
'northspride' anagrammed gives 'THIRD PERSON'.
'have' acts as a link.
(Other definitions for third person that I've seen before include "could be murderer" , "will suggest PC title for Greene novel?" , "stopped by Ancient Mariner?" , "Maybe they" , "winner of the bronze" .)