Eggs — one of three stepped on in car? (6)
I believe the answer is:
clutch
I believe this is a double definition.
'eggs' is the first definition.
(group of bird eggs)
'one of three stepped on in car?' is the second definition.
(one of the three pedals in a manual car)
(Other definitions for clutch that I've seen before include "Grasp - eggs laid in nest" , "Tightly grasp, eggs" , "Tightly hold" , "Get hold of" , "Seize - egg collection" .)