Pupil, Australian, stores rice (5)
I believe the answer is:
pilau
'rice' is the definition.
(pilau is a type of rice)
'pupil australian stores' is the wordplay.
'stores' says the answer is hidden in the clue.
'PILAU' is hidden within 'pupil australian'.
(Other definitions for pilau that I've seen before include "Rice cooked in well-seasoned broth" , "Oriental rice dish" , "Speciality" , "Indian rice recipe" , "Spicy rice dish from the East" .)