Should venue get rockstar from the east to restrict retinue? (7)

I believe the answer is:

cortege

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'retinue?' is the definition.
(synonyms)

'should venue get rockstar from the east to restrict' is the wordplay.
'CORTEGE' is hidden backwards in amongst the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for cortege that I've seen before include "train" , "Solemn funeral procession" , "Processing figures" , "Entourage, retinue" .)

I've seen this clue in The Irish Times.

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