Crossword Genius

Passion dominates game, we hear, in pointless tennis position (4,8,3)

Ross

I believe the answer is:

love conquers all

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

'we hear in pointless tennis position' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'passion dominates game' is the wordplay.
I cannot quite see how this works, but
'passion' could be 'love' (synonyms) and 'love' is found in the answer.
'game' could be 'on' (both can mean willing) and 'on' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Guardian.
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