Circumstances, moving to Tunisia (9)
I believe the answer is:
situation
'circumstances' is the definition.
(I've seen this in another clue)
'moving to tunisia' is the wordplay.
'moving' is an anagram indicator (letters are moved around).
'to'+'tunisia'='totunisia'
'totunisia' anagrammed gives 'SITUATION'.
(Other definitions for situation that I've seen before include "Location; job" , "Position" , "See 6" , "hole" , "Post" .)