Boys win girl's heart with change of heart? (5)

I believe the answer is:

swing

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'change of heart?' is the definition.
'swing' can be an answer for 'change' (swing is a kind of change). I'm not sure about the 'of heart?' bit.

'boys win girl's heart with' is the wordplay.
'with' says the answer is hidden in the clue.
'SWING' is hidden within 'boys win girls heart'.

Can you help me to learn more?

(Other definitions for swing that I've seen before include "Jaunty rhythm in music" , "Sweeping blow or stroke" , "Shift opinions; hang" , "Influence" , "Vacillate" .)

I've seen this clue in the Sydney Morning Herald.

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