Figure on the invoice for Pinot from mountaintop (6)
I believe the answer is:
amount
'figure' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for amount that I've seen before include "Sum of money" , "A quantity or total of anything" , "value" , "Measure, quantity" , "Size" .)