Shanghais sailors around Channel (7)
I believe the answer is:
abducts
'shanghais' is the definition.
(I've seen this in another clue)
'sailors around channel' is the wordplay.
'sailors' becomes 'abs' (AB is short for able seaman).
'around' is an insertion indicator.
'channel' becomes 'duct' (synonyms).
'abs' placed around 'duct' is 'ABDUCTS'.
(Other definitions for abducts that I've seen before include "Kidnaps" , "Takes away" , "Makes off with" , "Takes by force" .)