Hurt by love, one's protected by people coming together (13)

I believe the answer is:

harmonisation

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'coming together' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'hurt by love one's protected by people' is the wordplay.
'hurt by love' becomes 'harmo' (I can't justify this - if you can you should believe this answer much more).
'one's' becomes 'i's' (Roman numeral).
'protected by' indicates putting letters inside.
'people' becomes 'nation'.
'is' inserted within 'nation' is 'nisation'.
'harmo'+'nisation'='HARMONISATION'

Can you help me to learn more?

I've seen this clue in The Times.

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