Crossword Genius

Pepys, for one, is said to be the worst (6)

Ross

I believe the answer is:

direst

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

'pepys for one is said to be' is the wordplay.
'pepys for one' becomes 'diarist' (Samuel Pepys was a famous diarist).
'is said to be' shows a homophone (sound like).
'diarist' sounds like 'DIREST'.

'the' is the link.

(Other definitions for direst that I've seen before include "Most horrific" , "far from ideal" .)

I've seen this clue in The Guardian.
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