Old country only reforming after evacuation of Chile (6)
I believe the answer is:
ceylon
'old country' is the definition.
'Ceylon' can be an answer for 'country' (Ceylon is an example). I'm unsure of the 'old' bit.
'only reforming after evacuation of chile' is the wordplay.
'reforming' is an anagram indicator.
'after' is a charade indicator (letters next to each other).
'evacuation of' says to hollow out the word (remove centre letters) (the inside letters vacate the word).
'chile' with its centre removed is 'ce'.
'only' with letters rearranged gives 'ylon'.
'ylon' put after 'ce' is 'CEYLON'.
Can you help me to learn more?
(Other definitions for ceylon that I've seen before include "Sri Lanka, formerly" , "Old place" , "Sri Lanka's former name" , "Former name of Sri Lanka" .)