Very much at sea from cocaine? (7)

I believe the answer is:

oceanic

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'very much at sea' is the definition.
'oceanic' can be an answer for 'sea' (thesaurus). I am not certain of the 'very much at' bit.

'from cocaine?' is the wordplay.
'from' is an anagram indicator (the anagram comes from the same letters).
'cocaine' with letters rearranged gives 'OCEANIC'.

Can you help me to learn more?

(Other definitions for oceanic that I've seen before include "Relating to large seas" , "Relating to, eg, Atlantic or Pacific" , "Huge" , "Pertaining to the sea" , "Relating to the high seas" .)

I've seen this clue in The Telegraph.

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