Cardinal supports loud church celebration (5)
I believe the answer is:
feast
'celebration' is the definition.
(I know that feast is a type of celebration)
'cardinal supports loud church' is the wordplay.
'cardinal' becomes 'E' (East, a cardinal direction).
'supports' says to put letters next to each other (bottom letters provide a support for the top ones).
'loud' becomes 'f' (short for forte - 'loud' in music).
'church' becomes 'ast' (I am not sure about this - if you are sure you should believe this answer much more).
'e' put after 'f' is 'fe'.
'fe'+'ast'='FEAST'
Can you help me to learn more?
(Other definitions for feast that I've seen before include "Banquet or religious festival" , "wine and dine" , "entertainment" , "Tuck-in; blow-out" , "Eat lavishly" .)