Crossword Genius

Illegal deal makes revolutionary type march (9)

Ross

I believe the answer is:

champerty

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'illegal deal' is the definition.
The definition suggests a singular noun which matches the answer.

'revolutionary type march' is the wordplay.
'revolutionary' indicates an anagram.
'type'+'march'='typemarch'
'typemarch' with letters rearranged gives 'CHAMPERTY'.

'makes' acts as a link.

Can you help me to learn more?

(Another definition for champerty that I've seen is " outsider's contract".)

I've seen this clue in The Guardian.
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