Fruit and some milk? I wish! (4)
I believe the answer is:
kiwi
'fruit' is the definition.
(I know that kiwi is a fruit)
'some milk? i wish' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'KIWI' is hidden in the letters of 'milk i wish'.
'and' is the link.
(Other definitions for kiwi that I've seen before include "N Zealand bird" , "New Zealander (informal)" , "apteryx" , "Enzedder; flightless bird" , "Symbol of New Zealand" .)