Bewilder Australian model in narrow sea channel (7)
I believe the answer is:
astound
'bewilder' is the definition.
(I've seen this before)
'australian model in narrow sea channel' is the wordplay.
'australian' becomes 'A' (common abbreviation).
'model' becomes 't' (Ford Model T car).
'in' indicates putting letters inside.
'narrow sea channel' becomes 'sound' (I can't justify this - if you can you should believe this answer much more).
't' put within 'sound' is 'stound'.
'a'+'stound'='ASTOUND'
Can you help me to learn more?
(Other definitions for astound that I've seen before include "Startle" , "Bewilder" , "Flabbergast" , "Shock, surprise greatly" , "Bowl over" .)