Crossword Genius

Lost again in reverie about the past (9)

Ross

I believe the answer is:

nostalgia

'reverie about the past' is the definition.
(nostalgia is thinking about the past)

'lost again' is the wordplay.
'lost again' anagrams to 'NOSTALGIA'.
Though, I am unsure how the anagram is indicated.

'in' acts as a link.

(Other definitions for nostalgia that I've seen before include "Longing for something past - isn't a goal (anag)" , "Wistfulness" , "Sentimental longing for the past" , "Attraction to the past" , "severe homesickness" .)

I've seen this clue in The Irish Times and The Guardian.
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