The most common and most likely answer to this crossword clue is the 4 letter word CYAN
C
Y
A
N
More clues leading to the result CYAN
- Greenish-blue container with variable content
- Cold? No turning blue!
- Blue cheese, yoghurt and nuts for starters
- Tin containing a bit of yellow or blue- green
- Not all fancy a neutral colour
- Fancy a new fence in one of the 16 1 5
- Year in prison shade
- Shade of democracy, anarchic
- Blue? No Conservative’s upset to be that
- Caught Romeo escaping from relation in blue
Buddy explains!

The straight part
We know that "blue- green" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case blue- green = cyan.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 CYAN mean?
CYAN noun- A vibrant pale greenish-blue colour between blue and green in the visible spectrum; the complementary colour of red; the colour obtained by subtracting red from white light.
- Of the colour cyan.