Ice cream portion (5)
I believe the answer is:
scoop
'ice cream portion' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scoop that I've seen before include "Ice cream serving utensil" , "Exclusive story; utensil" , "bail" , "Ice-cream utensil" , "Hollow concave utensil" .)