Muppet who sings to his rubber duckie (5)

I believe the answer is:

ernie

(Other definitions for ernie that I've seen before include "___ Wise, d. 1999" , "Premium?bond computer" , "Premium Bonds selection computer" , "- - Bevin, 13 dn" , "Computer selecting Premium Bond winners" .)

I've seen this clue in the LA Times.

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