Misc: who wrote the opera "falstaff"??

Questions

A terrapin is a type of _________?

In a general sense, one who pleads for another in a court of law or other tribunal?

Republic in southeastern Europe, bounded on the north by Austria, on the northeast by Hungary, on the south by Croatia, and on the west by Italy?

Genus of annual and perennial herbs (Buttercup) containing about 20 species, grown for their showy flowers?

Gary Puckett sang 'Lady Willpower', among others. Name his backup band?