One egg and one roast cooked for starters (10)

'starters' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps there's a link between them I don't understand?

'one egg and one roast cooked' is the wordplay.
'one' becomes 'i' (Roman numeral).
'egg' becomes 'nit' (a nit is an insect egg).
'and' says to put letters next to each other.
'one' becomes 'i' (Roman numeral).
'cooked' is an anagram indicator (letters cooked into a new form).
'roast' is an anagram of 'ators'.
'i'+'nit'+'i'+'ators'='INITIATORS'

'for' acts as a link.

Can you help me to learn more?