The most common and most likely answer to this crossword clue is the 5 letter word TOSCA
I've seen this crossword clue in Financial Times
T
O
S
C
A
More clues leading to the result TOSCA
- First Oscar is too much for opera singer
- What players may perform in Rome and jockeys Ascot
- Part for Maria Callas to study endlessly
- Tenor’s given award, mostly for opera
- Rocky coast shown in opera
- 6 Down more than half way through opera
- Act so unnaturally in opera
- Part of Boito’s cast in opera
- Celebrated soprano to accompany half of 9
- Section of libretto’s captivating in opera
Buddy explains!

The straight part
We know that "What players may perform in Rome" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what players may perform in rome = tosca.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.