Pretty silly to get involved in shenanigans back there (5)

I believe the answer is:

inane

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'pretty silly' is the definition.
(I've seen this in another clue)

'get involved in shenanigans back there' is the wordplay.
'INANE' is hidden backwards in amongst the letters.
But, I'm not sure how this is indicated.

'to' is the link.

Can you help me to learn more?

(Other definitions for inane that I've seen before include "Mindlessly silly" , "Silly, fatuous" , "Frivolous" , "Puerile" , "Witless and pointless" .)

I've seen this clue in The Irish Times.

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