The snag with a free ride (5)
I believe the answer is:
hitch
I believe this clue is a double definition.
'the snag' is the first definition.
(synonyms)
'a free ride' is the second definition.
(I've seen this before)
'with' is the link.
(Other definitions for hitch that I've seen before include "To travel without paying" , "Unexpected problem" , "interruption" , "Jerk" , "Yank" .)