Roman moralist (4)

I believe the answer is:

cato

'roman moralist' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for cato that I've seen before include "Ancient Roman censor" , "classical writer" , "Roman statesman" , "Marcus Porcius - , Roman politician, censor" , "Senator" .)

I've seen this clue in The Wall Street Journal.

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