Where sailors eat dog's dinner? (4)
I believe the answer is:
mess
This clue is a double definition.
'where sailors eat' is the first definition.
(I've seen this before)
'dog's dinner?' is the second definition.
(I've seen this before)
(Other definitions for mess that I've seen before include "sloppy > food" , "Chaos, confusion" , "Confused situation" , "Canteen - chaos" , "Where sailors eat" .)