Going around Channel Island, drunk overturned source of drink (7)
I believe the answer is:
thermos
'source of drink' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'going around channel island drunk overturned' is the wordplay.
'going around' means one lot of letters goes inside another.
'channel island' becomes 'herm' (one of the Channel Islands).
'drunk' becomes 'sot' (both can mean someone who drinks too much).
'overturned' says the letters should be written backwards.
'sot' backwards is 'tos'.
'herm' inserted inside 'tos' is 'THERMOS'.
Can you help me to learn more?
(Other definitions for thermos that I've seen before include "Vacuum flask for mothers" , "Flask trade mark" , "Heat-retaining flask for mothers" , "Container to retain heat" .)