The most common and most likely answer to this crossword clue is the 9 letter word BAREFACED
I've seen this crossword clue in The Daily Telegraph
B
A
R
E
F
A
C
E
D
More clues leading to the result BAREFACED
- Flagrant European aspect in Shakespeare?
- Glaring error primarily confronted by advocates generally
- Framing judge, one is corrupt -- that's shameful
- Shameless when unveiled
- Undressed without a grimace? That’s brazen
- Flagrant in pub, editor pinching mug
- Graduate teacher snaffles damaged carafe, showing no shame
- Shameless British are confronted
- Type of liar who needs no unmasking?
Buddy explains!

The straight part
We know that "Type of liar who needs no unmasking" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case type of liar who needs no unmasking = barefaced.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 BAREFACED mean?
BAREFACED adjective- Undisguisedly offensive and bold; crude; coarse; brazen
- Open, undisguised
- Unbearded (not having a beard or other facial hair); clean-shaven.
- Unmasked (not wearing a mask) or not wearing a face covering