Roman coins of varying value changed in a ride (7)

I believe the answer is:

denarii

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'roman coins' is the definition.
(I've seen this in another clue)

'changed in a ride' is the wordplay.
'changed' indicates anagramming the letters.
'in'+'a'+'ride'='inaride'
'inaride' anagrammed gives 'DENARII'.

'of varying value' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for denarii that I've seen before include "money from abroad" , "A lot of asses" , "Bits" , "Old coins" , "22 [COINS]" .)

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

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