Get used to a diet short of stuffing and without gravy (6)
I believe the answer is:
adjust
'get used to' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
(Other definitions for adjust that I've seen before include "Alter slightly to be right for use" , "Adapt, fix" , "Adapt to new conditions" , "Make slight corrections to" , "Arrange, put into proper position" .)