Cake scored? Knife finally cutting into it (9)

'cake' is the definition.
(I know that Madeleine is a type of cake)

'scored? knife finally cutting into it' is the wordplay.
'scored?' becomes 'madelin' (I am not sure about this - if you are sure you should believe this answer much more).
'finally' indicates one should take the final letters.
'cutting into' means one lot of letters goes inside another.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
The final letter of 'knife' is 'e'.
'madelin' enclosing 'e' is 'madelein'.
'madelein'+'e'='MADELEINE'

Can you help me to learn more?