Paid out again in duplicate (6)

I believe the answer is:

paired

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'duplicate' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?

'paid out again' is the wordplay.
'out' means one lot of letters goes inside another.
'again' becomes 're' (prefix meaning 'again').
'paid' enclosing 're' is 'PAIRED'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for paired that I've seen before include "Were mates" , "'Coupled, matched (6)'" .)

I've seen this clue in the Evening Standard.

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