Explorer with trained hounds (6)
I believe the answer is:
hudson
'explorer' is the definition.
(I know that Hudson is a navigator)
'trained hounds' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'hounds' anagrammed gives 'HUDSON'.
'with' acts as a link.
(Other definitions for hudson that I've seen before include "navigator" , "8 [BUTLER" , "New York river; Upstairs/ Downstairs butler" , "Major inland sea of NE Canada - . . . . . . Bay" , "Rock -, - bay" .)