Gibberish about ordinary pale zircon (7)

I believe the answer is:

jargoon

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'pale zircon' is the definition.
'jargoon' can be an answer for 'zircon' (jargoon is a kind of zircon). I am not sure about the 'pale' bit.

'gibberish about ordinary' is the wordplay.
'gibberish' becomes 'jargon' (I've seen this before).
'about' indicates putting letters inside.
'ordinary' becomes 'O' (abbreviation eg in O-Level, Ordinary Level).
'jargon' going around 'o' is 'JARGOON'.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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