You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

Category: FROGS 
Clue: Probably best known to TV viewers as Valene Ewing, she had female lead in 1972 “Frogs”
joan van ark

Category: A CAST OF THOUSANDS 
Clue: It's what you're trying to catch when you're fly-casting
fish

Category: SURPRISE PARTY 
Clue: Hugh Hefner originally planned to call Playboy magazine this, another term for a bachelor party

stag