The most common and most likely answer to this crossword clue is the 11 letter word SPECTACULAR
I've seen this crossword clue in Financial Times
S
P
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C
T
A
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A
R
More clues leading to the result SPECTACULAR
- Impressive revised arrangement of act? Clap? Sure!
- Show cast clears up act
- Acts clear up after tumbling in this?
- Breathtaking act clears up mess
- Show as claret cup, erroneously
- Carp at clues in a way that’s really striking
- Show clears up act for broadcasting
- Curate claps wildly for lavish show
- Carp at clues which could be amazing?
- Curates clap wildly? That’s impressive
Buddy explains!

The straight part
We know that "this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this = spectacular.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 SPECTACULAR mean?
SPECTACULAR noun- A spectacular display.
- A pop-up (folded paper element) in material sent by postal mail.
- Amazing or worthy of special notice.
- Related to, or having the character of, a spectacle or entertainment.
- Relating to spectacles, or glasses for the eyes.