Real trouble collaring junior funds processor (9)

I believe the answer is:

launderer

I'm a little stuck... Click here to teach me more about this clue!

'funds processor' is the definition.
The definition suggests a singular noun which matches the answer.

'real trouble collaring junior' is the wordplay.
'trouble' indicates anagramming the letters.
'collaring' indicates putting letters inside.
'junior' becomes 'under' (I've seen this in other clues).
'real' with letters rearranged gives 'laer'.
'laer' placed around 'under' is 'LAUNDERER'.

Can you help me to learn more?

(Other definitions for launderer that I've seen before include "Cleaner (of clothes, linen)" , "Washer" , "Money dealer" .)

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

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