Foolhardy eruption (4)
I believe the answer is:
rash
I believe this is a double definition.
'foolhardy' is the first definition.
(I know that foolhardy can be written as rash)
'eruption' is the second definition.
(I know that rash is a type of eruption)
(Other definitions for rash that I've seen before include "Foolhardy with skin ailment" , "Impulsive, hasty" , "Daredevil" , "spate" , "Overhasty - skin irritation" .)