Train did crash on island (8)
I believe the answer is:
trinidad
'island' is the definition.
(I know that Trinidad is a island)
'train did crash' is the wordplay.
'crash' indicates anagramming the letters.
'train'+'did'='traindid'
'traindid' with letters rearranged gives 'TRINIDAD'.
'on' acts as a link.
(Other definitions for trinidad that I've seen before include "Caribbean island" , "Island linked to Tobago" , "West Indian island paired with Tobago" , "W. I. island" , "English-speaking island off Venezuela" .)