Crossword Genius

What a neat mathematical problem is worth? (4,3)

Ross

I believe the answer is:

tidy sum

I'm a little stuck... Click here to teach me more about this clue!

'worth?' is the definition.
The answer and definition can be both quantities as well as being singular nouns.
Maybe there's an association between them I don't understand?

'what a neat mathematical problem' is the wordplay.
'what a neat' becomes 'tidy' (synonyms).
'mathematical problem' becomes 'sum' (I've seen this before).
'tidy'+'sum'='TIDY SUM'

'is' is the link.

Can you help me to learn more?

(Other definitions for tidy sum that I've seen before include "A lot of money" , "Considerable amount" .)

I've seen this clue in the Evening Standard.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.