Charlie to become informed about a church blessing (9)
I believe the answer is:
clearance
'blessing' is the definition.
(both can mean permission)
'charlie to become informed about a church' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'to become informed' becomes 'learn' (learn about something).
'about' means one lot of letters goes inside another.
'church' becomes 'CE' (abbreviation for Church of England).
'learn' enclosing 'a' is 'learan'.
'c'+'learan'+'ce'='CLEARANCE'
(Other definitions for clearance that I've seen before include "Eviction from lands" , "evacuation" , "Sanction" , "Go-ahead" , "Permission to proceed" .)