Some whiskeys are made by a process that involves exposing the ingredients to the smoke from a peat fire. com/dictionary/turf )
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Some whiskeys are made by a process that involves exposing the ingredients to the smoke from a peat fire.
turf - "a piece of peat dried for fuel" ( https://www.merriam-webster.com/dictionary/turf )
Smoke that you get when burning turf (peat), which people used to use as a fuel, or still do in a few places, associated especially with Ireland.