Modern weapon protects individual on each island (3,6)
I believe the answer is:
new guinea
'each island' is the definition.
(I know that New Guinea is a island)
'modern weapon protects individual' is the wordplay.
I cannot really see how this works, but
'modern' could be 'new' (synonyms) and 'new' is found in the answer.
'individual' could be 'i' (Roman numeral for one) and 'i' is found in the answer.
'weapon' could be 'gun' (gun is a kind of weapon) and 'gun' is found within the remaining letters.
The remaining letters 'ea' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'on' is the link.
(Other definitions for new guinea that I've seen before include "Papua - - - -" , "divided island" , "Pacific island, the world's second largest" , "Island in the Western Pacific" .)