The most common and most likely answer to this crossword clue is the 7 letter word CADENZA
I've seen this crossword clue in The Guardian
C
A
D
E
N
Z
A
More clues leading to the result CADENZA
- Noted passage roughly skirting port close to Suez
- Untrustworthy type reportedly calls off a solo passage
- Short emperor absorbing a study of brilliant passage
- Dance crazes going to extremes over virtuoso passage
- Port in Czech Republic initially allowing free passage for musician?
- Extra notes about South Africa strewn across a study
- Solo passage can daze when being played
- Carl, Denzel, Art all lose butts -- twice -- with a flourish
- Shiraz Ned acclaims, coming from Down Under, shows flourish
- Virtuoso passage from A Study into Catholic South Africa
Buddy explains!

The straight part
We know that "Virtuoso passage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case virtuoso passage = cadenza.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 CADENZA mean?
CADENZA noun- A part of a piece of music, such as a concerto, that is very decorative and is played by a single musician.