Sub confused with advice to submerge with tank? (5-4)

I believe the answer is:

scuba-dive

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'submerge with tank?' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'sub confused with advice' is the wordplay.
'confused with' is an anagram indicator.
'sub' with its letters anagrammed with 'advice' gives 'SCUBA-DIVE'.

'to' acts as a link.

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I've seen this clue in The Times.

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