Crossword Genius

Virtually a letter delivered verbally (7)

Ross

I believe the answer is:

morally

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'virtually' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

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(Another definition for morally that I've seen is " To all intents and purposes - in terms of right and wrong".)

I've seen this clue in the Evening Standard.
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