The following clues form a word chain. The last three letters of one word or phrase form the first three letters of the next word, and the list wraps round from the last word to the first. Mostly straightforward with the odd toughie, but there may be one or two hyphenated words, alternative spellings or short phrases in there, and remember it was compiled by a Brit. Quite a few there, so feel free to grab two or three

-1. Finishes the last of an item (e.g. food)
uses up -2. Stellar explosion
supernova -3. Elliptical
oval -4. Brave
valiant -5. An event, circumstance, etc, that happens before another
antecedent -6. Businessman, especially a risk-taker
entrepreneur -7. Satellite of Jupiter
Eueopa -8. To exhibit a milky iridescence
opalesce -9. An imagined or projected sequence of events
scenario -10. Brazilian seaport
Rio de Janeiro -11. Large wooden 19th-century warship with armoured plating
ironclad -12. Title used to address or refer to any peeress except a duchess
ladyship -13. (In ancient Greece and Rome) an oval track for horse races and chariot races
hippodrome -14. Drug used in the treatment of gastric ulcers
omeprazole -15. Poisonous ornamental Eurasian shrub
oleander -16. Band which had Eric Clapton as a member
Derek & the Dominos -17. Quack medicine
nostrum -18. Making a deep resonant sound
rumbling-19. A means or place of entering
ingress -20. Member of a Judean sect from around 2nd century BC to second century AD
Essene -21. Tireless, vigorous
energetic -22. In UK horseracing, person who who conveys information to other bookmakers via hand-signals
tic-tac man -23. Tropical evergreen tree or shrub having intertwining aerial roots
-24. Needlessly expensive
overpriced -25. Diacritic placed under a consonant letter, most commonly 'c'
cedilla-26. Grassy treeless plain
llano-27. Without giving a name
anonymously -28. Hogwarts' house
Slytherin -29. Circus MC
ringmaster -30. Male falcons or hawks
tercels -31. Central American republic
El Salvador -32. Small rodent of the family
Gliridae dormouse