The most common and most likely answer to this crossword clue is the 10 letter word UNBLUSHING
I've seen this crossword clue in The Daily Telegraph
U
N
B
L
U
S
H
I
N
G
Buddy explains!
The straight part
We know that "Bold/not highly coloured" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bold/not highly coloured = unblushing.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 UNBLUSHING mean?
UNBLUSHING adjective- Not blushing
- Shameless