Strange France initially overturned monarchy (7)
I believe the answer is:
foreign
'strange' is the definition.
('foreign' can be similar in meaning to 'strange')
'france initially overturned monarchy' is the wordplay.
'france' becomes 'f'.
'initially' suggests taking the first letters.
'monarchy' becomes 'reign' (I've seen this before).
The initial letter of 'overturned' is 'o'.
'f'+'o'+'reign'='FOREIGN'
(Other definitions for foreign that I've seen before include "Of or from another country" , "Strange, from abroad" , "Extraneous" , "Concerning other nations" , "Non-native" .)