Pacific ecosystem rumbled North and cut out (8,7)

I believe the answer is:

humboldt current

'pacific ecosystem' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'rumbled north and cut out' is the wordplay.
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'rumbled'+'north'='rumblednorth'
'rumblednorth' put after 'cut' is 'cutrumblednorth'.
'cutrumblednorth' with letters rearranged gives 'HUMBOLDT CURRENT'.

I've seen this clue in The Independent.

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