Simpsons bus driver (4)

I believe the answer is:

otto

'simpsons bus driver' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for otto that I've seen before include "Male German name - a palindrome" , "- - Preminger (films)" , "Reversible German" , "German emperor" , "____ Preminger, US film director born in Austria" .)

I've seen this clue in the Newsday and the King Feature Syndicate.

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