The most common and most likely answer to this crossword clue is the 6 letter word UNFAIR
I've seen this crossword clue in The Times
U
N
F
A
I
R
More clues leading to the result UNFAIR
- Not just Macron’s a moderate
- Dishonest female fired from amusement park
- Not just as brown mops are?
- Biased, as brunette is?
- Not just a run, if jumping
- Foul place to see Aunt Sally skipping foxtrot?
- Not starting amusements is mean
- Discriminatory amusements, excluding female
- Not just dodgems etc don’t start
- Not just an international trade show
Buddy explains!

The straight part
We know that "Biased" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case biased = unfair.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 UNFAIR mean?
UNFAIR verb- To make ugly
- Not beautiful; uncomely; unattractive
- Sorrowful; sad
- Unseemly; disgraceful
- Not fair, unjust