Crossword Genius

Regularly, without fluctuation (8)

Ross

I believe the answer is:

steadily

(Other definitions for steadily that I've seen before include "Surely and regularly" , "with regularity" , "In regular and balanced way" , "Regularly, constantly" , "Unfalteringly; gradually" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.
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