Silly chicken animator's segment runs backwards (5)

I believe the answer is:

inane

I'm a little stuck... Click here to teach me more about this clue!

'silly' is the definition.
(I've seen this before)

'chicken animator's segment runs backwards' is the wordplay.
'INANE' is hidden backwards within the letters.
But, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for inane that I've seen before include "Stupid and silly" , "Witless and pointless" , "Mindlessly silly" , "Foolish, fatuous" , "unimaginative" .)

I've seen this clue in The Independent.

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