Duck in English Channel going west (5)
I believe the answer is:
evade
'duck' is the definition.
(I know that duck can be written as evade)
'english channel going west' is the wordplay.
'english' becomes 'E' (abbreviation).
'channel' becomes 'dave' (Dave is a British free-to-air television station).
'going west' says the letters should be written backwards (letters heading to the west or left).
'e'+'dave'='edave'
'edave' backwards is 'EVADE'.
'in' acts as a link.
(Other definitions for evade that I've seen before include "Get round" , "Manage to avoid" , "Fail to pay" , "To get away from" , "Escape (esp. by guile)" .)