Negligent
'negligent' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for remiss that I've seen before include "Negligent, lax" , "Negligent like misers" , "Derelict in duty" , "Negligent, slack" , "Neglectful" .)
'negligent' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for casual that I've seen before include "Informal or cursory" , "Negligent" , "Informal, not methodical" , "Careless; unsystematic" , "Free and easy" .)
'negligent' is the definition.
(associated in meaning)
This is all the clue.
(Other definitions for careless that I've seen before include "Slapdash" , "Incautious" , "Lax" , "'Heedless, unthinking (8)'" , "Not careful or thorough enough" .)
'negligent' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for lax that I've seen before include "Insufficiently strict" , "Not strict enough" , "Flabby" , "Remiss" , "Not sufficiently careful" .)