Agitated Croatian drops paint in Ulster maybe? (8)
I believe the answer is:
raincoat
'ulster maybe?' is the definition.
(Ulster is a type of raincoat)
'agitated croatian' is the wordplay.
'agitated' is an anagram indicator.
'croatian' is an anagram of 'RAINCOAT'.
'drops paint in' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
(Other definitions for raincoat that I've seen before include "Macintosh - with 22a" , "Wet weather gear" , "Protective garment for Croatian" , "Catriona (anag.)" , "Waterproof outer garment" .)