Sick sort of film director taking concessions back (10)
I believe the answer is:
indisposed
'sick' is the definition.
(similar in meaning)
'sort of film director taking concessions back' is the wordplay.
'sort of film' becomes 'indie' (independent film).
'director' becomes 'd'.
'taking' is an insertion indicator.
'concessions' becomes 'sops' (sop is a kind of concession).
'back' says the letters should be written backwards.
'sops' written backwards gives 'spos'.
'indie'+'d'='indied'
'indied' placed around 'spos' is 'INDISPOSED'.
(Other definitions for indisposed that I've seen before include "Out of sorts" , "Slightly unwell" , "Poorly" .)