The most common and most likely answer to this crossword clue is the 6 letter word BLUEST
I've seen this crossword clue in The Daily Telegraph
B
L
U
E
S
T
More clues leading to the result BLUEST
Buddy explains!
The straight part
We know that "most crude" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case most crude = bluest.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 BLUEST mean?
BLUEST adjective- Of the colour blue.
- Depressed, melancholic, sad.
- Pale, without redness or glare; said of a flame.
- Supportive of, run by (a member of), pertaining to, or dominated by a political party represented by the colour blue.
- Of the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.
- (of steak) Extra rare; left very raw and cold.
- (of a dog or cat) Having a coat of fur of a slaty gray shade.
- Severe or overly strict in morals; gloomy.
- (of women) literary; bluestockinged.
- Having a color charge of blue.
- (entertainment) Risque or obscene