Archipelago that is is sent aid organised by European (4,6)
I believe the answer is:
east indies
'archipelago' is the definition.
(I have seen 'Malay archipelago ' mean 'east indies' so perhaps 'archipelago' could also mean 'east indies')
'is sent aid organised by european' is the wordplay.
'organised' indicates an anagram.
'by' means one lot of letters go next to another.
'european' becomes 'E' (abbreviation e.g. EU).
'is'+'sent'+'aid'='issentaid'
'issentaid' anagrammed gives 'astindies'.
'astindies' put after 'e' is 'EAST INDIES'.
'that is' acts as a link.
(Other definitions for east indies that I've seen before include "Malay archipelago" , "distant location" .)