One with less fluid in the Scillies, say (5)
I believe the answer is:
isles
'the scillies say' is the definition.
I can't judge whether this definition defines the answer.
'one with less fluid' is the wordplay.
'one' becomes 'i' (Roman numeral).
'with' is a charade indicator (letters next to each other).
'fluid' is an anagram indicator.
'less' anagrammed gives 'sles'.
'i'+'sles'='ISLES'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for isles that I've seen before include "Eyots" , "eg the Scillies" , "Archipelago" , "eg Fiji and Tonga" , "Hebrides, perhaps" .)