Has a portion of meat, say (4)
I believe the answer is:
eats
'has' is the definition.
(eating is a kind of having)
'a portion of meat say' is the wordplay.
'a portion of' indicates a hidden word.
'EATS' is hidden in the letters of 'meat say'.
(Other definitions for eats that I've seen before include "Takes nourishment" , "corrodes" , "Swallows food" , "what is on the Christmas menu" , "Common grub" .)