Ill-considered breakout (4)
I believe the answer is:
rash
I believe this is a double definition.
'ill-considered' is the first definition.
(synonyms)
'breakout' is the second definition.
(I've seen this in another clue)
(Other definitions for rash that I've seen before include "not considered" , "Ill-considered - break-out" , "Ill-considered - outbreak" , "Ill-advised" , "Impulsive - skin condition" .)