Kind of tiny pie without filling (4)
I believe the answer is:
type
'kind' is the definition.
(I know that type is a type of kind)
'tiny pie without filling' is the wordplay.
'tiny' becomes 'ty' (I can't explain this - if you can you should believe this answer much more).
'without filling' means to remove the middle letters.
'pie' with its centre removed is 'pe'.
'ty'+'pe'='TYPE'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for type that I've seen before include "Sort - way to write" , "output, printed" , "Category; use keyboard" , "Figure" , "Produce characters" .)