In American sports
vernacular, "clutch" is an adjective alternately describing pressure
situations or an athlete
skilled in these situations, or sometimes a noun
for these situations. According to Merriam-Webster
, this usage dates to 1944.
The most common usage is in baseball, where a player may be described as a "clutch hitter" for his skills with men on base and his team needing runs. Other common uses are to describe the player in a general sense ("he's so clutch"), or by a broadcaster to enhance the viewer's perception of the situation ("this is a clutch situation for Carolina, up by one and killing off their sixth penalty").