Crossword Genius

Answer people, having the last word (4)

Ross

I believe the answer is:

amen

'having the last word' is the definition.
(I've seen this before)

'answer people' is the wordplay.
'answer' becomes 'a' (abbreviation eg in Q and A).
'people' becomes 'men' (man is a kind of person**).
'a'+'men'='AMEN'

(Other definitions for amen that I've seen before include "Approve" , "Word of approval" , "I agree!" , "Word of agreement" , "prayer's ending" .)

I've seen this clue in The Times.
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