Refusing to be going downhill (9)

I believe the answer is:

declining

This clue is a double definition.

'refusing' is the first definition.
('decline' can be a synonym of 'refuse')

'going downhill' is the second definition.
(I've seen this before)

'to be' is the link.

(Another definition for declining that I've seen is " Going downhill".)

I've seen this clue in The Times.

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