Dwarf planet in the asteroid belt (5)
I believe the answer is:
ceres
'dwarf planet in the asteroid belt' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ceres that I've seen before include "Dwarf planet; goddess of agriculture" , "Head of agriculture" , "She fills granaries" , "chief of agriculture" , "Roman goddess of agriculture" .)