Train engineers transport for late passengers (8)
I believe the answer is:
rehearse
'train engineers' is the definition.
'rehearse' can be an answer for 'train' (thesaurus). I am not certain of the 'engineers' bit.
'transport for late passengers' is the wordplay.
'transport' becomes 'hearse' (hearse is a kind of transport).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'late passengers' becomes 're' (I can't explain this - if you can you should believe this answer much more).
'hearse' put after 're' is 'REHEARSE'.
Can you help me to learn more?
(Other definitions for rehearse that I've seen before include "Recite - try out" , "Practise parts" , "prepare for performance" , "Go over" , "Practice for the performance" .)