Only a fool would jeer about a saint (6)

I believe the answer is:

jester

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'only a fool would' is the definition.
I can't tell whether this defines the answer.

'jeer about a saint' is the wordplay.
'about' indicates putting letters inside.
'a saint' becomes 'st' (abbreviation).
'jeer' placed around 'st' is 'JESTER'.

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(Other definitions for jester that I've seen before include "Yorick" , "Comic" , "Clown employed to entertain a ruler" , "Professional joker" , "Court clown" .)

I've seen this clue in the Evening Standard.

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