John or John Quincy
I believe the answer is:
adams
'john or john quincy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for adams that I've seen before include "revolutionary leader" , "Douglas - (The Hitchhiker's Guide to the Galaxy)" , "Former US president" , "Name of two early US presidents" , "American composer" .)