One to resist change as Hera did somehow
I believe the answer is:
die-hard
'one to resist change' is the definition.
(I've seen this before)
'hera did somehow' is the wordplay.
'somehow' is an anagram indicator.
'hera'+'did'='heradid'
'heradid' is an anagram of 'DIEHARD'.
'as' is the link.
(Other definitions for die-hard that I've seen before include "One strongly opposed to change" , "Backer of a losing cause" , "Strong opponent of change" , "Ultra-conservative" , "One who won't accept novelty" .)