The most common and most likely answer to this crossword clue is the 6 plus 3 letter word DICKEY BOW
I've seen this crossword clue in The Times
D
I
C
K
E
Y
B
O
W
More clues leading to the result DICKEY BOW
Buddy explains!

The straight part
We know that "Attire for male" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case attire for male = dickey bow.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.