Crossword Genius

One’s predecessor reacts on being corrected (8)

Ross

I believe the answer is:

ancestor

'one's predecessor' is the definition.
(an ancestor who came before someone)

'reacts on being corrected' is the wordplay.
'being corrected' indicates an anagram.
'reacts'+'on'='reactson'
'reactson' is an anagram of 'ANCESTOR'.

(Other definitions for ancestor that I've seen before include "An escort (anag.)" , "not being of the modern generation" , "descent comes from one" , "Forefather" , "Adam was our first one" .)

I've seen this clue in The Times.
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