Isle everyone goes round to (5)
I believe the answer is:
atoll
'isle' is the definition.
(I know that atoll is a type of isle)
'everyone goes round to' is the wordplay.
'everyone' becomes 'all' (all people).
'goes round' means one lot of letters goes inside another.
'all' placed around 'to' is 'ATOLL'.
(Other definitions for atoll that I've seen before include "land threatened by rising sea levels" , "Bikini, say" , "Coral circle" , "Coral island(s) surrounding a lagoon" , "Ring-shaped coral reef enclosing a lagoon" .)