Crossword Genius

Bill singing well? (7)

Ross

I believe the answer is:

invoice

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This could be a double definition.

'bill' is the first definition.
(invoicing is a kind of billing)

'singing well?' is the second definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?

Can you help me to learn more?

(Other definitions for invoice that I've seen before include "List of goods supplied and request for payment" , "Demand for payment" , "Statement of sum due" , "Pollen holder" , "Statement of money owed" .)

I've seen this clue in The Sun.
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