A comedian performs in Balkan region (9)
I believe the answer is:
macedonia
'balkan region' is the definition.
'Macedonia' can be an answer for 'region' (Macedonia is an example). I'm not sure about the 'balkan' bit.
'a comedian performs in' is the wordplay.
'performs' is an anagram indicator.
'in' means one lot of letters goes inside another.
'comedian' is an anagram of 'mcedonia'.
'a' inserted into 'mcedonia' is 'MACEDONIA'.
Can you help me to learn more?
(Other definitions for macedonia that I've seen before include "European country, capital Skopje" , "Southeast European country" , "Alexander the Great's homeland" , "Landlocked Balkan country" , "republic" .)