The most common and most likely answer to this crossword clue is the 9 letter word WAGNERIAN
I've seen this crossword clue in The Guardian
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More clues leading to the result WAGNERIAN
- Like some music drama, unusually wearing, and endless?
- Fan of German scorer wearing knitted article
- Orchestrate a new Ring, including one in same style
- Wearing an outfit, like a dramatic opera singer?
- Footballer’s girlfriend/model Annie taking on queen of German style
- Potential winner, aga great and powerful
Buddy explains!

The straight part
We know that "like a dramatic opera singer?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like a dramatic opera singer? = wagnerian.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.