Island that is carried round? (6)
I believe the answer is:
borneo
'island' is the definition.
(Indonesian island)
'carried round?' is the wordplay.
'carried' becomes 'borne' (past tense of 'bear' in the sense of 'carry').
'round?' becomes 'o' (o is a circular letter).
'borne'+'o'='BORNEO'
'that is' acts as a link.
(Other definitions for borneo that I've seen before include "Largest island of Asia" , "Oberon on the large Asian island" , "Island in the western Pacific" , "Third largest island in the world" , "country" .)