The most common and most likely answer to this crossword clue is the 6 letter word PALLOR
I've seen this crossword clue in Independent
P
A
L
L
O
R
More clues leading to the result PALLOR
- Expression of surprise after TV system’s lack of colour
- Ghastly look of some municipal lorries
- Paleness from friend left in front of soldiers
- Whiteness of china egg held in both hands
- In poker, tolerable bridge player needs all round replacement: no flush results
- Sickly aspect of everybody into mostly fortified wine
- Buddy left gold showing a lack of colour
- Whiteness of cloud tipped with gold
Buddy explains!

The straight part
We know that "Paleness" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case paleness = pallor.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 PALLOR mean?
PALLOR noun- Paleness; want of color; pallidity; wanness.