tent pole
n.— «Megan McTavish, the show’s head writer, said she was most astonished that fans elevated Bianca into one of the serial’s “tent poles”—soap parlance for characters who hold enormous sway with viewers.» —“After Coming Out, a Soap Opera Heroine Moves On” by Patrick D. Healy New York Times Feb. 24, 2005. (source: Double-Tongued Dictionary)
Further reading
Imagine telling someone how to get to your home, but without using the name of your street, or any other street within ten miles. Could you do it? We take street names for granted, but these words are useful for far more, like applying for a job or...
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...