One wrecked in departing? (5)
I believe the answer is:
train
'one wrecked in departing?' is the definition.
I can't tell whether this defines the answer.
'one wrecked in' is the wordplay.
'one wrecked' becomes 'tra' (I am not sure about this - if you are sure you should believe this answer much more).
'tra'+'in'='TRAIN'
Can you help me to learn more?
(Other definitions for train that I've seen before include "Prepare oneself by exercising" , "Instruct - exercise" , "Teach, series (of events)" , "Public transport on the railway" , "Coach - string of coaches" .)