Stone containers capsizing a cargo ship (10)
I believe the answer is:
sarcophagi
'stone containers' is the definition.
(containers made of stone)
'capsizing a cargo ship' is the wordplay.
'capsizing' indicates anagramming the letters.
'a'+'cargo'+'ship'='acargoship'
'acargoship' anagrammed gives 'SARCOPHAGI'.
(Other definitions for sarcophagi that I've seen before include "Stone tombs" , "Ancient caskets" .)