Fondly farewelling a promising bore (7,4)

I believe the answer is:

wishing well

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'fondly farewelling a' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'promising bore' is the wordplay.
'promising' becomes 'wishing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bore' becomes 'well' (I've seen this before).
'wishing'+'well'='WISHING-WELL'

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

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