Very old, moving into Chile (9)
I believe the answer is:
neolithic
'very old' is the definition.
(I've seen this before)
'moving into chile' is the wordplay.
'moving' indicates anagramming the letters (letters are moved around).
'into'+'chile'='intochile'
'intochile' anagrammed gives 'NEOLITHIC'.
(Other definitions for neolithic that I've seen before include "Of New Stone Age" , "Stone-Age" , "about when stone weapons prevailed" , "Description of old age" , "Of the later part of the Stone Age" .)