Miserable with a tickly throat, quite possibly?

I believe the answer is:

down in the mouth

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'miserable' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for down in the mouth that I've seen before include "Blue" , "depressed" , "Duck meals: you might get this" , "Miserable" , "feathers, orally" .)

I've seen this clue in The Telegraph.

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