The most common and most likely answer to this crossword clue is the 5 letter word BLUSH
I've seen this crossword clue in The Daily Telegraph
B
L
U
S
H
More clues leading to the result BLUSH
Buddy explains!

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 BLUSH mean?
BLUSH noun- An act of blushing; a red glow on the face caused by shame, modesty, etc.
- A glow; a flush of colour, especially pink or red.
- Feeling or appearance of optimism.
- A sort of makeup, frequently a powder, used to redden the cheeks.
- A color between pink and cream.
- A pale pink wine made by removing the dark grape skins at the required point during fermentation.
- To become red in the face (and sometimes experience an associated feeling of warmth), especially due to shyness, shame, excitement, or embarrassment.
- To be ashamed or embarrassed (to do something).
- To become red.
- To suffuse with a blush; to redden; to make rosy.
- To change skin color in the face (to a particular shade).
- To express or make known by blushing.
- To have a warm and delicate colour, like some roses and other flowers.
- To glance with the eye, cast a glance.
- The collective noun for a group of boys.