Crossword Genius

Keeping up (10)

Ross

I believe the answer is:

sustaining

'keeping up' is the definition.
('sustain' can be a synonym of 'keep up')

This is all the clue.

(Other definitions for sustaining that I've seen before include "Strengthening, supporting" , "bearing" , "Encouraging" , "Supportive" .)

I've seen this clue in The Washington Post.
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