Ice storm raging round island of same size (9)
I believe the answer is:
isometric
'same size' is the definition.
Both the definition and answer are adjectives. Maybe you can see a link between them that I can't see?
'ice storm raging round island' is the wordplay.
'raging' indicates an anagram.
'round' means one lot of letters goes inside another.
'island' becomes 'i' (geographical abbreviation).
'ice'+'storm'='icestorm'
'icestorm' with letters rearranged gives 'isometrc'.
'isometrc' enclosing 'i' is 'ISOMETRIC'.
'of' is the link.
Can you help me to learn more?
(Other definitions for isometric that I've seen before include "equal in measurement" , "Like some exercises" , "Type of exercise performed against resistant object" , "of equal size" , "Type of angled drawing to scale - eroticism (anag)" .)