7 down
Knight
guzzling
absinthe,
originally
on
the
wagon
(6)
Knight guzzling absinthe, originally on the wagon (6)
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The definition is at the beginning of the clue.
How the clue works
Right, so Knight is your definition — pointing to Gawain, one of Arthur's Round Table lot. For the wordplay, take "originally" as your cue to grab the first letters of "guzzling absinthe", which gives you GA, then stick that in front of WAIN, which is just an old word for "the wagon" — GA plus WAIN builds the knight's name.