Ultimately Jeb Bush succeeds occasionally funded by rock'n'roller (5,5)

I believe the answer is:

buddy holly

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'rock'n'roller' is the definition.
I can't judge whether this definition defines the answer.

'ultimately jeb bush succeeds occasionally funded by' is the wordplay.
'ultimately' says to take the final letters.
'bush' becomes 'holly' (holly is a type of bush).
'succeeds' says to put letters next to each other (I've seen this in other clues).
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
The last letter of 'jeb' is 'b'.
'funded'+'by'='fundedby'
The alternating letters of 'fundedby' are 'uddy'.
'holly' put after 'uddy' is 'uddyholly'.
'b'+'uddyholly'='BUDDY HOLLY'

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(Another definition for buddy holly that I've seen is " singer".)

I've seen this clue in The Independent.

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