Meat starter of mutton introduced by resort (4)
I believe the answer is:
spam
'meat' is the definition.
(Spam is an example)
'starter of mutton introduced by resort' is the wordplay.
'starter of' says to take the initial letters.
'introduced by' says to put letters next to each other.
'resort' becomes 'spa' (spa is a kind of resort).
The first letter of 'mutton' is 'm'.
'm' put after 'spa' is 'SPAM'.
(Other definitions for spam that I've seen before include "Unwelcome approach" , "one doesn't want on computer" , "Uninvited email" , "Unwanted e-mails" , "Unwanted communication" .)