Drop a toll devised to make the most money (9)

I believe the answer is:

topdollar

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

'drop a toll devised' is the wordplay.
'devised' is an anagram indicator.
'drop'+'a'+'toll'='dropatoll'
'dropatoll' with letters rearranged gives 'TOPDOLLAR'.

'to' acts as a link.

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I've seen this clue in The Daily Express.

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