Shape; number (6)
I believe the answer is:
figure
I believe this clue is a double definition.
'shape' is the first definition.
(figure is a kind of shape)
'number' is the second definition.
(figure is a kind of number)
(Other definitions for figure that I've seen before include "Imagine; integer" , "Shape; number" , "Body shape" , "movement by skater" , "Person's bodily shape" .)