Crossword Genius

Before he hits top, crashes, I can only wish he'll succeed (1,4,3,3,4)

Ross

I believe the answer is:

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'i can only wish he'll succeed' is the definition.
The definition suggests a singular noun but the answer is not.

'before he hits top crashes' is the wordplay.
'crashes' indicates anagramming the letters.
'before'+'he'+'hits'+'top'='beforehehitstop'
'beforehehitstop' with letters rearranged gives 'I HOPE FOR THE BEST'.

Can you help me to learn more?

I've seen this clue in Sydney Morning Herald.