Goods originally conveyed by legendary ship (5)
I believe the answer is:
cargo
'goods' is the definition.
(cargo is a kind of goods)
'originally conveyed by legendary ship' is the wordplay.
'originally' suggests taking the first letters.
'by' is a charade indicator (letters next to each other).
'legendary ship' becomes 'argo' (I've seen this before).
The initial letter of 'conveyed' is 'c'.
'c'+'argo'='CARGO'
(Other definitions for cargo that I've seen before include "Hold contents" , "This taken on board" , "Goods in transit" , "Goods carried by vessel or vehicle" , "Goods carried by ship, aircraft" .)