Mikado character says it to tasty food! (3-3)
I believe the answer is:
yum-yum
'mikado character says it' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'tasty food' is the wordplay.
'tasty' becomes 'yum' (I've seen this in another clue).
'food' becomes 'yum' (I am not sure about this - if you are sure you should believe this answer much more).
'yum'+'yum'='YUM-YUM'
'to' is the link.
Can you help me to learn more?
(Other definitions for yum-yum that I've seen before include "Character in The Mikado; nice food!" , "Expression of delight, especially of delicious food" , "A ward of Ko-Ko (The Mikado)" , "One of the Three Little Maids from School - that's tasty!" , "Exclamation of pleasure at taste sensation" .)