Figure, digit (6)
I believe the answer is:
number
This clue is a double definition.
'figure' is the first definition.
(I know that figure can be written as number)
'digit' is the second definition.
(I've seen this before)
(Other definitions for number that I've seen before include "Count; amount" , "Cardinal or ordinal" , "Arithmetical value; song" , "Mathematical value" , "One may be irrational or negative" .)