Belligerent publican on Lewis maybe ignoring Sabbath (7)
I believe the answer is:
hostile
'belligerent' is the definition.
(similar in meaning)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for hostile that I've seen before include "Belligerent" , "Antagonistic" , "The soil strangely is unfriendly" , "Showing angry opposition" , "Enemy" .)