Criminal Mafia boss hiding ingot under carpet (4,5)

I believe the answer is:

drug baron

'criminal' is the definition.

'mafia boss hiding ingot under carpet' is the wordplay.
'mafia boss' becomes 'don' (I've seen this before).
'hiding' means one lot of letters goes inside another.
'ingot' becomes 'bar' (I've seen this before).
'under' means one lot of letters go next to another.
'carpet' becomes 'rug' (synonyms).
'bar' after 'rug' is 'rugbar'.
'don' placed around 'rugbar' is 'DRUG BARON'.

I've seen this clue in The Telegraph.

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