Tied up, we went by road (4)
I believe the answer is:
drew
'tied up' is the definition.
'drew' can be an answer for 'tied' (I've seen this before). I am not certain of the 'up' bit.
'we went by road' is the wordplay.
'went' indicates anagramming the letters ('go' can mean move).
'by' says to put letters next to each other.
'road' becomes 'dr' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'we' with letters rearranged gives 'ew'.
'ew' put after 'dr' is 'DREW'.
Can you help me to learn more?
(Other definitions for drew that I've seen before include "Entertainer Barrymore" , "neither won nor lost" , "was attractive" , "--- Barrymore, actress; sketched" , "Sketched; attracted" .)