Fair diversion leading straight on to crash? (5,5)
I believe the answer is:
Here is my best explanation:
'fair diversion' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'leading straight on to crash?' is the subsidiary indication.
'leading' is a charade indicator (letters next to each other).
'to crash?' is an anagram indicator (I've seen 'crash' mean this).
'straight' after 'on' is 'onstraight'.
'onstraight' is an anagram of 'ghosttrain'.
(Other definitions for ghost train that I've seen before include "Fairground attraction", "Spooky ride", "funfair ride" and "scary ride".)