Crossword Genius

With all sincerity (9)

Ross

I believe the answer is:

earnestly

(Other definitions for earnestly that I've seen before include "Relent, say, in sincere and serious manner" , "with heart and soul" , "how Wilde character may be acted?" , "Sincerely and seriously" , "with gusto" .)

I've seen this clue in the Sydney Morning Herald.
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