Cuba's peculiar mode of diving (5)

I believe the answer is:

scuba

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'mode of diving' is the definition.
'scuba' can be an answer for 'diving'. I'm unsure of the 'mode of' bit.

'cuba's peculiar' is the wordplay.
'peculiar' indicates an anagram (a peculiar or strange ordering of the letters).
'cubas' is an anagram of 'SCUBA'.

Can you help me to learn more?

(Other definitions for scuba that I've seen before include "Diving apparatus" , "Self-contained underwater breathing apparatus (acronym)" , "Diving equipment" , "Skin-diving apparatus" , "Apparatus for divers" .)

I've seen this clue in the Evening Standard.

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