In Serbia, perhaps, one finds a land of exile (7)
I believe the answer is:
siberia
'a land of exile' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'in serbia perhaps one' is the wordplay.
'in' means one lot of letters goes inside another.
'perhaps' is an anagram indicator.
'one' becomes 'I' (Roman numeral).
'serbia' anagrammed gives 'sibera'.
'sibera' going around 'i' is 'SIBERIA'.
'finds' is the link.
Can you help me to learn more?
(Other definitions for siberia that I've seen before include "Area of eastern Russia" , "region abroad" , "Eastern region of Russia" , "Region in former USSR noted for harsh winters and notorious for prison camps" , "a place often very cold" .)