Dine out and finish, unsettled (13)
I believe the answer is:
indeterminate
'unsettled' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?
'dine out and finish' is the wordplay.
'dine out' becomes 'inde' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' is a charade indicator (letters next to each other).
'finish' becomes 'terminate' (synonyms).
'inde'+'terminate'='INDETERMINATE'
Can you help me to learn more?
(Other definitions for indeterminate that I've seen before include "Not exactly known" , "Not exactly defined" , "Vague - unsettled" , "Unfixed, uncertain" , "uncertain result?" .)