Online shopper's "basket" (4)
I believe the answer is:
cart
'online shopper's basket' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cart that I've seen before include "Don't put this before the horse (4)" , "Carrying vehicle" , "Old two-wheeled goods vehicle" , "Two-wheeled open wagon" , "Farm vehicle" .)