The most common and most likely answer to this crossword clue is the 5 letter word BEAUT
B
E
A
U
T
Buddy explains!
The straight part
We know that "something very remarkable" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case something very remarkable = beaut.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 BEAUT mean?
BEAUT noun- Something or someone that is physically attractive.
- Something that is a remarkable example of its type.
- Beautiful, splendid.