Sugarpuss's Clicking
My short assembly of the relevant scenes (let me know if I missed any) is here:
http://youtu.be/VV9hUyPjutA
It's a cute conceit: Katherine "Sugarpuss" O'Shea (Stanwyck) clicks her way through Hawks's Ball of Fire (1941), loses her click-mojo slightly near the end, but evidently has passed much of it on to her Professor-cherubs (who need it).