They know a lot about IT in depth: two conceal great cunning (8)

I believe the answer is:

digerati

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'they know a lot about it' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'depth two conceal great cunning' is the wordplay.
'depth' becomes 'd' (abbreviation in geometry).
'two' becomes 'II' (Roman numerals).
'conceal' indicates putting letters inside.
'cunning' is an anagram indicator.
'great' is an anagram of 'gerat'.
'ii' going around 'gerat' is 'igerati'.
'd'+'igerati'='DIGERATI'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for digerati that I've seen before include "Computer experts" , "Geeks" .)

I've seen this clue in The Guardian.

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