Crossword Genius

Sound of the blues? Occasionally get immersed (7)

Ross

I believe the answer is:

tenable

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'sound' is the definition.
(both can mean solid or viable)

'the blues? occasionally get immersed' is the wordplay.
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'get' is an insertion indicator.
'immersed' becomes 'nab' (I can't explain this - if you can you should give a lot more credence to this answer).
'the'+'blues'='theblues'
The alternate letters of 'theblues' are 'tele'.
'tele' going around 'nab' is 'TENABLE'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for tenable that I've seen before include "Late Ben (anag.)" , "Capable of being kept" , "Based on sound reasoning or evidence" , "Of argument, rational and defensible" , "Well-founded" .)

I've seen this clue in the Sydney Morning Herald.
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