Primness caused by dried fruit with spectrum makers (6,3,6)

I believe the answer is:

prunes and prisms

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'primness caused' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'by dried fruit with spectrum makers' is the wordplay.
'by' is a charade indicator (letters next to each other).
'dried fruit' becomes 'prunes' (I've seen this in another clue).
'with' becomes 'and'.
'spectrum makers' becomes 'prisms' (I've seen this in another clue).
'prunes' next to 'and' is 'prunesand'.
'prunesand'+'prisms'='PRUNES AND PRISMS'

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I've seen this clue in the Sydney Morning Herald.

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