So Gary wrecked the ship (6)
I believe the answer is:
argosy
'the ship' is the definition.
(thesaurus)
'so gary wrecked' is the wordplay.
'wrecked' indicates anagramming the letters.
'so'+'gary'='sogary'
'sogary' anagrammed gives 'ARGOSY'.
(Other definitions for argosy that I've seen before include "Ancient merchant ship" , "Large merchant ship (poetic)" , "Old merchant ship" , "A great fleet as Spain once had" , "Great merchant ship" .)