I can be some famous duets,
an animal named 'cause of breasts,
a cute little toy,
by stagehands employed,
or sexennial safety threats.
Who am I?
The answer is:
I can be some famous duets
Dolly Parton, the singer. "Islands in the Stream" is one famous duet of hers.The Dolly Suite A piano piece for 4 hands.
an animal named after breasts
Dolly the sheep was named after Dolly Parton. "Dolly is derived from a mammary gland cell and we couldn’t think of a more impressive pair of glands than Dolly Parton’s."
a cute little toy
by stagehands employed
a dolly is used to move things around.
or sexennial safety threats
My answer is
This is because
It can be the name of a duet named "Tonight I'm Playin' Possum". Its name is similar to another word for breasts, which is bosom. It can be a cute stuffed toy. The sexennial safety threat might be related to the average lifespan of a Victoria Possum, which is about 6-7 years.
Additional details after a comment on the subject:
After a quick Google search, I found out that Will Possum is the stagehand at the town talent show in Emmet Otter's Jug Band Christmas.