Mac (8)
I believe the answer is:
raincoat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mac</span>' is the definition.<br/ ><span class="explanation-format__explanation">(macintosh is a type of raincoat)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for raincoat that I've seen before include "Catriona (anag.)" , "Wet weather gear" , "protection against the elements" , "Water-resistant outer garment" , "Waterproof outer garment" .)