Change of rule as in the Legion (7)
I believe the answer is:
foreign
'in the legion' is the definition.
I can't tell whether this defines the answer.
'change of rule' is the wordplay.
'change' indicates an anagram.
'rule' becomes 'reign' (synonyms).
'of' is an anagram of 'fo'.
'fo'+'reign'='FOREIGN'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for foreign that I've seen before include "Unfamiliar; from abroad" , "Peculiar" , "Extraneous" , "not appropriate" , "Exotic" .)