Docker, English, travelled with animal doctors westwards (9)
I believe the answer is:
stevedore
'docker' is the definition.
(synonyms)
'english travelled with animal doctors westwards' is the wordplay.
'english' becomes 'E' (abbreviation).
'travelled' becomes 'rode' (eg travelled on a horse).
'with' is a charade indicator (letters next to each other).
'animal doctors' becomes 'vets' (I've seen this before).
'westwards' shows that the letters should be reversed in order (letters go right to left or from 'east' to 'west').
'e'+'rode'+'vets'='erodevets'
'erodevets' written backwards gives 'STEVEDORE'.
(Other definitions for stevedore that I've seen before include "One loads and unloads ships" , "Hold worker" , "Worker who loads and unloads ships" , "one working in docks" , "Docker" .)