Lovers of good food ordered no gross meat (11)
I believe the answer is:
gastronomes
'lovers of good food' is the definition.
(I've seen this in another clue)
'ordered no gross meat' is the wordplay.
'ordered' is an anagram indicator.
'no'+'gross'+'meat'='nogrossmeat'
'nogrossmeat' is an anagram of 'GASTRONOMES'.
(Other definitions for gastronomes that I've seen before include "No gross meat (anag)" , "Gourmets" .)