Twenty pence contribution? That's kind! (4)
I believe the answer is:
type
'kind' is the definition.
(type is a kind of kind)
'twenty pence contribution?' is the wordplay.
'contribution?' says the answer is hidden in the clue (I've seen 'contribution' mean this).
'TYPE' is hidden within 'twenty pence'.
'that's' is the link.
(Other definitions for type that I've seen before include "The face" , "Write using a keyboard" , "Kind - press keys" , "Sort - pattern - print" , "Write letters" .)