Vexatious (11)
'vexatious' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for troublesome that I've seen before include "Hard" , "problematic" , "irritating" , "likely to cause ructions" , "Trying" .)
'vexatious' is the definition.
(synonyms)
This is all the clue.
(Other definitions for annoying that I've seen before include "Irksome" , "tiresome" , "Irking" , "Bothersome, pesky" , "Irritating, bothersome" .)
'vexatious' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for irksome that I've seen before include "Smoker I find annoying" , "'Tedious, tiresome (7)'" , "Tiresome, irritating" , "Troublesome, vexing" , "Annoying or tiresome" .)
'vexatious' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for trying that I've seen before include "Making an effort - it's irritating" , "irksome" , "work on bench" , "Aggravating" , "Testing" .)