Ordinary boring menials ground bits of wheat (8)
I believe the answer is:
semolina
'bits of wheat' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'ordinary boring menials ground' is the wordplay.
'ordinary' becomes 'O' (abbreviation e.g. O-Levels).
'boring' indicates putting letters inside (to bore something can mean to drill into it).
'ground' indicates an anagram ('grind' the letters into a new form).
'menials' is an anagram of 'semlina'.
'o' placed into 'semlina' is 'SEMOLINA'.
Can you help me to learn more?
(Other definitions for semolina that I've seen before include "sweet" , "Wheat product used in pasta" , "Type of milk pudding" , "Cereal used for puddings" , "As oilmen eat this pudding" .)