Display plumage in face-off (8)

I believe the answer is:

showdown

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'face-off' is the definition.
(I've seen this before)

'display plumage' is the wordplay.
'display' becomes 'show' (synonyms).
'plumage' becomes 'down' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'show'+'down'='SHOWDOWN'

'in' is the link.

Can you help me to learn more?

(Other definitions for showdown that I've seen before include "Final confrontation as in western film" , "Decisive confrontation" , "Final test, often found in westerns" , "Face-off" , "Dramatic conclusion" .)

I've seen this clue in The Irish Times.

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