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 tell whether this defines the answer.

'ultimately jeb bush succeeds occasionally funded by' is the wordplay.
'ultimately' suggests 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' means one should take alternating 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' 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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