The most common and most likely answer to this crossword clue is the 11 letter word ULTRAMARINE
I've seen this crossword clue in The Times
U
L
T
R
A
M
A
R
I
N
E
More clues leading to the result ULTRAMARINE
- Soldier upholding extremist position in spectrum?
- Vehicle getting a run in University bus service is blue
- Animal mutated with truer colouring
- Sort of blue extreme Republican in New England state
- Wild animal with truer colour
- Tone of extremist republican in US state
- Refined family around river taking in source of riotous colour
- Colour’s run with material ruined
Buddy explains!
The straight part
We know that "blue" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case blue = ultramarine.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.
Crossword Answer definitions
ULTRAMARINE noun- A brilliant blue pigment that is either extracted from mineral deposits or made synthetically; traditionally made from ground-up lapis lazuli.
- A brilliant pure dark blue or slightly purplish colour.
- Of a brilliant blue colour.
- Beyond the sea.