Cryptic enigmatically features ancient folk (5)

I believe the answer is:

iceni

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'cryptic enigmatically features ancient folk' is the definition.
I can't judge whether this definition defines the answer.

'cryptic enigmatically features' is the wordplay.
'features' indicates a hidden word (I've seen 'featuring' mean this).
'ICENI' can be found hidden inside 'cryptic enigmatically'.

Can you help me to learn more?

(Other definitions for iceni that I've seen before include "Boudicca's tribe" , "British people once" , "Ancient British tribe" , "Old people" , "Boadicea's tribe" .)

I've seen this clue in The Independent.

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