2.Definition: a coupling that connects or disconnects driving and driven parts of a driving mechanism
"This year's model has an improved clutch"
3.Definition: a number of birds hatched at the same time
4.Definition: a pedal or lever that engages or disengages a rotating shaft and a driving mechanism
"He smoothely released the clutch with one foot and stepped on the gas with the other"
5.Definition: a tense critical situation
"He is a good man in the clutch"