One feeding relative rice, for example (5)
I believe the answer is:
Here is my best explanation:
'rice for example' is the definition.
(rice is a kind of grain)
'one feeding relative' is the wordplay.
'one' becomes 'i' (Roman numeral).
'feeding' is an insertion indicator.
'relative' becomes 'gran' (I've seen this in other clues**).
'i' put within 'gran' is 'GRAIN'.
(Other definitions for grain that I've seen before include "Character", "Small quantity (of corn etc)", "Cereal as food", "Crop", "Small weight; seed", "basis for whisky", "Enter into combat with", "character", "Particle of e.g. sand" and "Corn; seed".)