Drag behind, haul (3)
I believe the answer is:
tow
I believe this clue is a double definition.
'drag behind' is the first definition.
(synonyms)
'haul' is the second definition.
(I know that tow is a type of haul)
(Other definitions for tow that I've seen before include "form of flax" , "Pull or drag along behind" , "Pull away" , "Pull along (a vehicle)" , "Drag along behind, say barge" .)