A wild animal died, being trained? (6)
I believe the answer is:
aboard
'being trained?' is the definition.
(eg aboard a 'train')
'a wild animal died' is the wordplay.
'wild animal' becomes 'boar' (**).
'died' becomes 'd'.
'a'+'boar'+'d'='ABOARD'
(Other definitions for aboard that I've seen before include "on a ferry?" , "in a car" , "on a train, perhaps" , "A poet penning nothing on vessel" , "On (a ship, train, etc)" .)