Pessimist succeeded in lifting mind-set on New Year (9)

I believe the answer is:

doomsayer

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'pessimist' is the definition.
(a doomsayer has a pessimistic attitude)

'succeeded in lifting mind-set on new year' is the wordplay.
'succeeded in' becomes 's' (genealogical abbreviation. I am not sure about the 'in' bit.).
'lifting' says the letters should be written backwards.
'mind-set' becomes 'mood' (I've seen this in another clue).
'on' means one lot of letters go next to another.
'new' is an anagram indicator.
'mood' back-to-front is 'doom'.
'year' anagrammed gives 'ayer'.
's' put after 'doom' is 'dooms'.
'dooms'+'ayer'='DOOMSAYER'

Can you help me to learn more?

(Another definition for doomsayer that I've seen is " Pessimist".)

I've seen this clue in The Times.

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