It's partly a republic, i.e. country without king (7)
I believe the answer is:
ireland
'it's partly a republic' is the definition.
I can't tell whether this defines the answer.
'i e country without king' is the wordplay.
'country' becomes 'land' (synonyms).
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'king' becomes 'R' (abbreviation for rex, king in Latin).
'i'+'e'+'land'='ieland'
'ieland' enclosing 'r' is 'IRELAND'.
Can you help me to learn more?
(Other definitions for ireland that I've seen before include "EU member country" , "Eng. composer, country" , "Erin" , "See 10" , "European country" .)