Accountant at fair gets wind up, needing place to eat (9)
I believe the answer is:
cafeteria
'place to eat' is the definition.
(I've seen this before)
'accountant at fair gets wind up' is the wordplay.
'accountant' becomes 'ca' (abbreviation for chartered accountant).
'at' is a charade indicator (letters next to each other).
'fair' becomes 'fete' (I've seen this before).
'gets wind up' becomes 'ria' (I can't justify this - if you can you should believe this answer much more).
'ca'+'fete'+'ria'='CAFETERIA'
'needing' is the link.
(Other definitions for cafeteria that I've seen before include "greasy spoon?" , "eating-place" , "place of refreshment" , "Self-help facility" , "where food is served" .)