One less spoilt in the Scillies, say (5)
I believe the answer is:
isles
'scillies say' is the definition.
I can't tell whether this defines the answer.
'one less spoilt in' is the wordplay.
'one' becomes 'i' (Roman numeral).
'spoilt' indicates an anagram.
'in' means one lot of letters goes inside another.
'less' is an anagram of 'sles'.
'i' inserted within 'sles' is 'ISLES'.
'the' is the link.
Can you help me to learn more?
(Other definitions for isles that I've seen before include "British locations, say?" , "Islands" , "Hebrides, perhaps" , "Archipelago" , "Eyots" .)