Historic king starting lunch (non-vegetarian) (5)
I believe the answer is:
offal
'non-vegetarian' is the definition.
I can't tell whether this definition defines the answer.
'historic king starting lunch' is the wordplay.
'historic king' becomes 'Offa' (8th-century king of Mercia).
'starting' says to take the initial letters.
The first letter of 'lunch' is 'l'.
'offa'+'l'='OFFAL'
Can you help me to learn more?
(Other definitions for offal that I've seen before include "Edible heart, liver and tongue, for instance" , "Internal organs and entrails as food" , "Waste material" , "Edible liver or heart of animal" , "Animal entrails and internal organs - worthless" .)