Cathedral cleric dismissing chapter immediately (4)
I believe the answer is:
anon
'immediately' is the definition.
(thesaurus)
'cathedral cleric dismissing chapter' is the wordplay.
'cathedral cleric' becomes 'canon' (I've seen this before).
'dismissing' is a deletion indicator.
'chapter' becomes 'c'.
'canon' with 'c' taken out is 'ANON'.
(Other definitions for anon that I've seen before include "Of unknown identity, in short" , "Shortly; unknown" , "Without known author" , "Having no known name" , "Immediately" .)