Crossword Genius

Tax officer goes round church without leading chaplain (9)

Ross

I believe the answer is:

surcharge

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

'tax' is the definition.
(I've seen this before)

'officer goes round church without leading chaplain' is the wordplay.
I cannot quite understand how this works, but
'church' could be 'rc' (abbreviation for Roman Catholic) and 'rc' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for surcharge that I've seen before include "supplement" , "Tax" , "extra amount" , "Additional sum demanded" , "addition to cost" .)

I've seen this clue in The Independent.
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