Monobob, e,g, (4)
I believe the answer is:
sled
'monobob eg' is the definition.
(I know that monobob is a type of bob)
This is the entire clue.
(Other definitions for sled that I've seen before include "American toboggan" , "Sledge" , "Snow transport" , "Sleigh" , "Tray on which to slide" .)