If definite, the recital is fixed (7)
I believe the answer is:
article
'if definite' is the definition.
(part of speech can be definite or indefinite)
'the recital is fixed' is the wordplay.
'is fixed' indicates anagramming the letters.
'recital' is an anagram of 'ARTICLE'.
(Other definitions for article that I've seen before include "Eg, a, an or the" , "See 10" , "Newspaper piece" , "Thing - composition - item" , "What journalist writes" .)