Satellite covering GB for Nigerian people (4)

I believe the answer is:

igbo

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'for nigerian people' is the definition.
I can't judge whether this defines the answer.

'satellite covering gb' is the wordplay.
'satellite' becomes 'Io' (Io is a moon of Jupiter).
'covering' means one lot of letters goes inside another.
'io' going around 'gb' is 'IGBO'.

Can you help me to learn more?

(Other definitions for igbo that I've seen before include "people abroad" , "language in Nigeria" , "Nigerian language" .)

I've seen this clue in The Independent.

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