Skipping small cake for ice cream (4)
I believe the answer is:
cone
'for ice cream' is the definition.
(cone can refer to an ice cream cone)
'skipping small cake' is the wordplay.
'skipping' suggests deleting specific letters.
'small' becomes 's' (abbreviation - e.g. clothes size).
'cake' becomes 'scone' (scone is a type of cake).
'scone' with 's' removed is 'CONE'.
(Other definitions for cone that I've seen before include "99, maybe" , "often full of ice" , "Circular pyramid" , "Ice-cream cornet" , "Volcanic peak" .)