Sum? Am splitting final figure (3)
I believe the answer is:
add
'sum?' is the definition.
('add' can be a synonym of 'sum')
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for add that I've seen before include "Say as a further remark" , "Sum, total" , "Reckon" , "Go further" , "Combine (numbers)" .)