Yes, "ivres". The S mysteriously disappeared, though the underline was there.
Had never heard of the Oxford races before, but "torpid" was in my thesaurus under "boat". They sound anything but. You Brits are strange. ;-)
Didn't appreciate the subtlety of JUICED ... until you pointed it out. Great puzzle -- a PIECE (of) WORK.
Your last statement had me baffled, but I see there's a Listener puzzle with that title. Please post the link. Haven't found it yet. Recently started doing the Guardian Genius. Current one (#94) is about wines!
Don't get the "US sailor" part in 26A.
Cheers!