Decorate road travelling north (5)
I believe the answer is:
adorn
'decorate' is the definition.
(synonyms)
'road travelling north' is the wordplay.
'travelling' is an anagram indicator.
'north' becomes 'n' (abbreviation).
'road' anagrammed gives 'ador'.
'ador'+'n'='ADORN'
(Other definitions for adorn that I've seen before include "Festoon" , "Bedeck" , "Deck" , "get dressed!" , "Embellish, decorate" .)