Cathedral cleric will get caught out soon (4)
I believe the answer is:
anon
'soon' is the definition.
(synonyms)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for anon that I've seen before include "Mystery writer" , "Writer unknown" , "soon to be written" , "Of unknown name (abbr)" , "Soon; unnamed" .)