Has some food in great steakhouse (4)
I believe the answer is:
eats
'has some food' is the definition.
'in great steakhouse' is the wordplay.
'in' indicates the answer is hidden within the clue.
'EATS' is hidden within 'great steakhouse'.
(Other definitions for eats that I've seen before include "meal" , "Takes meals" , "Victuals" , "corrodes" , "Ingests" .)