Watering-hole of top people to finish with huge accusations nastily made? (9)

I believe the answer is:

innuendos

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'watering-hole of top people' is the definition.
I can't judge whether this defines the answer.

'finish with huge accusations nastily made?' is the wordplay.
I cannot really understand how this works, but
'finish' could be 'end' (synonyms) and 'end' is located in the answer.
'huge' could be 'os' (abbreviation for outsize) and 'os' is located in the answer.
This explanation may well be incorrect...

'to' acts as a link.

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I've seen this clue in The Times.

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