Guess how many! (6)
I believe the answer is:
figure
'guess' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for figure that I've seen before include "Build" , "Shape; number" , "movement by skater" , "Symbol representing a number" , "The written symbol of a number" .)