What is referred to by 'a second banana'?

What is associated with: a seasonal favorite baseball nut first hit a home run in 1958 to celebrate the dodgers move fr… Based on the clue 'a secluded building often the residence of a guru ...', what is the answer? Based on the clue 'a secluded or private road', what is the answer? Based on the clue 'a second after this hypothesized explosion the tem...', what is the answer? Based on the clue 'a second grade science experiment includes labelin...', what is the answer? What is associated with: a second is defined as the period of 9192631770 oscillations of this element symbl cs? What is associated with: a second place finisher on november 3 2004 it was john kerry? Based on the clue 'a second prosecution for the same offense or this ...', what is the answer?