The most common and most likely answer to this crossword clue is the 6 letter word BIGOTS
I've seen this crossword clue in Financial Times
B
I
G
O
T
S
Buddy explains!

The straight part
We know that "Racists maybe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case racists maybe = bigots.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 BIGOTS mean?
BIGOTS noun- One who is narrow-mindedly devoted to one's own ideas and groups, and intolerant of (people of) differing ideas, races, genders, religions, politics, etc.
- One who is overly pious in matters of religion, often hypocritically or else superstitiously so.