A pig died being transported? (6)
I believe the answer is:
aboard
'being transported?' is the definition.
(transported aboard)
'a pig died' is the wordplay.
'pig' becomes 'boar' (male pig).
'died' becomes 'd' (abbreviation next to the year of someone's death).
'a'+'boar'+'d'='ABOARD'
(Other definitions for aboard that I've seen before include "at sea, say?" , "On vessel or vehicle" , "on base" , "on boat, perhaps" , "On a ship, train, plane or other vehicle" .)