Ho-hum feeling (5)

I think it could be either:

Which length description are you looking for?:

ennui

'ho-hum feeling' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ennui that I've seen before include "Boredom, tedium" , "The feeling of being bored" , "having nothing to do" , "Listless feeling" , "Low interest rate" .)

I've seen this clue in the USA Today and the Newsday.

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