Mackintosh, eg (8)
I believe the answer is:
raincoat
'mackintosh eg' is the definition.
(I know that Mackintosh is a type of raincoat)
This is all the clue.
(Other definitions for raincoat that I've seen before include "Mac" , "Protective garment for Croatian" , "Mackintosh" , "Water-resistant outer garment" , "Wet weather wear" .)