The most common and most likely answer to this crossword clue is the 9 letter word BLINKERED
I've seen this crossword clue in Financial Times
B
L
I
N
K
E
R
E
D
More clues leading to the result BLINKERED
Buddy explains!
The straight part
We know that "Arab at Ascot may be so/narrow-minded" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case arab at ascot may be so/narrow-minded = blinkered.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 BLINKERED mean?
BLINKERED verb- To put blinkers on.
- Wearing blinkers or blinders.
- Having tunnel vision; unable to see what is happening around one.