The most common and most likely answer to this crossword clue is the 8 letter word RAINCOAT
I've seen this crossword clue in The Guardian
R
A
I
N
C
O
A
T
More clues leading to the result RAINCOAT
- Creation of Croatian garment
- Unusual Croatian waterproof garment
- . Agitated Croatian drops paint in Ulster maybe?
- Actor in a sporting garment
- Actor in a rumpled mac
- Scoundrel acquires a popular firm making clothing
- Artist has designed action that’s perfect for a British summer?
- Mac, a cool guy from Zagreb, runs to the front
- Croatian is dressed in a waterproof
- Mac cartoon loses nothing in translation, having excellent content
Buddy explains!

The straight part
We know that "Mac" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case mac = raincoat.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RAINCOAT mean?
RAINCOAT noun- A waterproof coat to be worn in the rain.
- A condom.