What might be stage entrances? (5)

I believe the answer is:

gates

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

'entrances?' is the definition.
(I've seen this in another clue)

'what might be stage' is the wordplay.
'stage' can be anagrammed to 'GATES'.
Though, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for gates that I've seen before include "Stage is set for them to open and close" , "Openings" , "philanthropist" , "Microsoft's Bill?" , "One of the founders of Microsoft" .)

I've seen this clue in The Sun.

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