The most common and most likely answer to this crossword clue is the 9 letter word BOWERBIRD
B
O
W
E
R
B
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R
D
Buddy explains!
The straight part
We know that "Singer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case singer = bowerbird.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 BOWERBIRD mean?
BOWERBIRD noun- Any of the family Ptilonorhynchidae of Australasian bird noted for building a large nest decorated with bright objects such as shells and glass.
- A person who collects objects for display.