Crossword Genius

Like the Blues song set to succeed (2,3,5,5)

Ross

I believe the answer is:

on the right track

'set to succeed' is the definition.

'like the blues song' is the wordplay.
I cannot quite see how this works, but
'song' could be 'track' (I've seen this before) and 'track' is found in the answer.
The remaining letters 'ontheright' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

I've seen this clue in The Times.
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