Entrances groups of spectators (5)

I believe the answer is:

gates

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'entrances groups of spectators' is the definition.
'gates' can be an answer for 'entrances' (I've seen this before). I am unsure of the 'groups of spectators' bit.

'entrances groups of spectators' is the wordplay.
'entrances' suggests taking the first letters (I've seen 'entrance of' mean this).
'of spectators' becomes 'ates' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The first letter of 'groups' is 'g'.
'g'+'ates'='GATES'

Can you help me to learn more?

(Other definitions for gates that I've seen before include "Billionaire Bill - openers" , "Rich American" , "Entrances (for Bill?)" , "admission?" , "Moveable barriers" .)

I've seen this clue in The Globe and Mail.

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