Sweet to shoot big cat for current king in Zaire (10)
I believe the answer is:
zabaglione
'sweet' is the definition.
(zabaglione is a kind of sweet)
'shoot big cat for current king in zaire' is the wordplay.
I cannot quite understand how this works, but
'cat' could be 'lion' (lion is a kind of cat) and 'lion' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'to' is the link.
(Other definitions for zabaglione that I've seen before include "Italian egg/wine dessert" , "dish" , "frothy dessert" , "Sweet" , "Italian dessert of egg yolks, sugar and wine" .)