The most common and most likely answer to this crossword clue is the 5 letter word VISOR
I've seen this crossword clue in Independent
V
I
S
O
R
More clues leading to the result VISOR
- Mask, very intriguingly, slipping on rogue initially
- Eyeshade? Guest has dropped it
- Shield it from guest
- One hides face as guest loses it
- Top half of 21 down or its cover
- ‘Noble Love’: Dior’s ultimate sun blocker
- Short member of nobility wants alternative face protection
- Screen caller, picking out just what’s needed
- Face protection from half a dozen special soldiers
- Consultant drops notice in a flap
Buddy explains!

The straight part
We know that "Face protection" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case face protection = visor.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 VISOR mean?
VISOR noun- A part of a helmet, arranged so as to lift or open, and so show the face. The openings for seeing and breathing are generally in it.
- A mask for the face.
- The fore piece of a cap, projecting over, and protecting the eyes.