The most common and most likely answer to this crossword clue is the 8 letter word PUGGAREE
I've seen this crossword clue in The Times
P
U
G
G
A
R
E
E
More clues leading to the result PUGGAREE
Buddy explains!

The straight part
We know that "turban" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case turban = puggaree.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 PUGGAREE mean?
PUGGAREE noun- A strip of cloth wound around the upper portion of a hat or helmet, particularly a pith helmet, and falling down behind to act as a shade for the back of the neck.