Crossword Genius

Succeeding generations notice that thing on end of chimney (9)

Ross

I believe the answer is:

posterity

'succeeding generations' is the definition.
(I've seen this before)

'notice that thing on end of chimney' is the wordplay.
'notice' becomes 'poster' ('poster' can be a synonym of 'notice'**).
'that thing' becomes 'it'.
'on' is a charade indicator (letters next to each other).
'end of' indicates one should take the final letters.
The last letter of 'chimney' is 'y'.
'poster'+'it'+'y'='POSTERITY'

(Other definitions for posterity that I've seen before include "Succeeding generations" , "Future generations" , "for people coming later" .)

I've seen this clue in The Independent.
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