Noel Coward dismissed oracle in Ulster (4)

I believe the answer is:

down

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'noel coward' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for down that I've seen before include "Blue" , "Out of action; soft feathers" , "Depressed - drink" , "Not working (computer)" , "Where this clue is going" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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