Disgusting feeling on retirement, killing time for pension essentially (7)

I believe the answer is:

noisome

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

I can't explain the rest of the clue.

(Other definitions for noisome that I've seen before include "Having an extremely offensive smell" , "unhealthy" , "Nasty" , "Extremely unpleasant" , "Harmful - noxious" .)

I've seen this clue in The Hindu.

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