Crossword Genius

Prop used by non-leading actors (7)


I believe the answer is:


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

'prop' is the definition.
(I know that prop is a more specific form of the action support)

'non-leading actors' is the wordplay.
I cannot quite see how this works, but
'leading' could be 'up' (up can mean leading in a game) and 'up' is found in the answer.
The remaining letters 'sport' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'used by' is the link.

Can you help me to learn more?

(Other definitions for support that I've seen before include "Hold up" , "Maintain, back" , "Provide with food, clothing and shelter, or encouragement" , "Uphold" , "second" .)

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