Crossword Genius

Expose one swapping partners in kind of ball (10)

Ross

I believe the answer is:

outswinger

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'kind of ball' is the definition.
'outswinger' can be an answer for 'ball' (type of delivery in cricket). I am unsure of the 'kind of' bit.

'expose one swapping partners' is the wordplay.
'expose' becomes 'out' (to out someone is to expose them).
'one swapping partners' becomes 'swinger' (I can't explain this - if you can you should give a lot more credence to this answer).
'out'+'swinger'='OUTSWINGER'

'in' is the link.

Can you help me to learn more?

I've seen this clue in The Times.
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