Cake’s radius: where to bet about it (5)
I believe the answer is:
torte
'cake's' is the definition.
(torte is a kind of cake)
'radius where to bet about it' is the wordplay.
I cannot quite understand how this works, but
'radius' could be 'r' (abbreviation in geometry) and 'r' is found within the answer.
'to' is present in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
A single letter 'e' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for torte that I've seen before include "Rich sweet cake" , "German cream cake" , "(Austrian) cake with cream and fruit or nuts" , "1d [PASTRY]" , "Sweet cake (from Ger.)" .)