Lasting longer than an excursion around the heart of Bolivia (9)

I believe the answer is:

outliving

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'lasting longer' is the definition.
The answer and definition can be both to do with fundamental existence as well as being present participle verbs.
Maybe you can see a link between them that I can't see?

'an excursion around the heart of bolivia' is the wordplay.
'an excursion' becomes 'outing' (synonyms).
'around' is an insertion indicator.
'the heart of' indicates the central letters.
The centre of 'bolivia' is 'liv'.
'outing' going around 'liv' is 'OUTLIVING'.

'than' is the link.

Can you help me to learn more?

(Another definition for outliving that I've seen is " Existing longer".)

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

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