Pennsylvania has changed the governor (5)
I believe the answer is:
pasha
'the governor' is the definition.
(I've seen this before)
'pennsylvania has changed' is the wordplay.
'pennsylvania' becomes 'PA'.
'changed' is an anagram indicator.
'has' is an anagram of 'sha'.
'pa'+'sha'='PASHA'
(Other definitions for pasha that I've seen before include "High-ranking Turk" , "High ranking Turkish official or officer" , "Turkish title" , "foreign officer" , "Civil or military authority in Turkey or Egypt" .)