How one became ever more firm with? (8)
I believe the answer is:
steadily
'how' is the definition.
Both the definition and answer are adverbs. Maybe you can see a link between them that I can't see?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for steadily that I've seen before include "with regularity" , "Regularly, constantly" , "Surely and regularly" , "Unfalteringly; gradually" , "In unfaltering manner" .)