Greek character out to lunch saves meat for prophet (8)

'prophet' is the definition.
(Muhammad is an example)

'greek character out to lunch saves meat' is the wordplay.
'greek character' becomes 'mu' (letter from the Greek alphabet).
'out to lunch' becomes 'mad'.
'saves' indicates putting letters inside.
'meat' becomes 'ham' (ham is a kind of meat).
'mu'+'mad'='mumad'
'mumad' placed around 'ham' is 'MUHAMMAD'.

'for' acts as a link.