Crossword Genius

People take part in it on the side (4,4)

Ross

I believe the answer is:

team game

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

'people take part' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'it on the side' is the wordplay.
'it' becomes 'game' (I can't justify this - if you can you should believe this answer much more).
'on' is a charade indicator (letters next to each other).
'the side' becomes 'team' (a side is a sporting team).
'game' put after 'team' is 'TEAM GAME'.

'in' acts as a link.

Can you help me to learn more?

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