Anger smouldering in RC service? (7)

I believe the answer is:

incense

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'anger' is the definition.
(to incense is make angry)

'in rc service?' is the wordplay.
'rc service?' becomes 'cense' (I can't explain this - if you can you should believe this answer much more).
'in'+'cense'='INCENSE'

'smouldering' acts as a link.
This may not be right. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for incense that I've seen before include "that might be sensed in church?" , "To outrage" , "Get under someone's skin" , "Substance burning in a censer" , "Enrage greatly" .)

I've seen this clue in The Sun.

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