Cryptic crossword clue
Mackellar’s unable to sing properly, poorly about opening of opera 5

The most common and most likely answer to this crossword clue is the 5 letter word ROOPY

R
O
O
P
Y

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The straight part
We know that "Mackellar’s unable to sing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case mackellar’s unable to sing = roopy.
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.

Crossword Answer definitions

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