Scottish festival always associated with chap minding pigs? (8)

I believe the answer is:

hogmanay

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'scottish festival' is the definition.
(Scottish term for new year's eve)

I can't explain the rest of the clue.

(Other definitions for hogmanay that I've seen before include "Scottish celebration framed in mahogany" , "New Year's Eve north of the border" , "New Year's Eve (Scots)" , "New Year's Eve in Glasgow" , "New Year's Eve in Scotland" .)

I've seen this clue in The Times.

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