Call from a curb (4)
I believe the answer is:
taxi
'call from a curb' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for taxi that I've seen before include "Hired vehicle" , "Hackney cab" , "Danny DeVito sitcom" , "Move along a runway" , "(Of a plane) move slowly on the ground" .)