Unwise outbreak? (4)
I believe the answer is:
rash
This clue is a double definition.
'unwise' is the first definition.
(thesaurus)
'outbreak?' is the second definition.
(rash can mean a sudden outbreak)
(Other definitions for rash that I've seen before include "Ill-considered - outbreak" , "Flood" , "complaint" , "Red area on skin" , "Ill-considered - break-out" .)