Small dessert for King Edward? (4)
I believe the answer is:
spud
'king edward?' is the definition.
(I've seen this before)
'small dessert' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'dessert' becomes 'pud' (short for pudding).
's'+'pud'='SPUD'
'for' is the link.
(Other definitions for spud that I've seen before include "Spade; potato (slang)" , "The humble colloquial potato" , "One might have an eye" , "Vegetable" , "one's eyed" .)