Native attempts to trap British on island (9)
I believe the answer is:
tribesman
'native' is the definition.
(I've seen this before)
'attempts to trap british on island' is the wordplay.
'attempts' becomes 'tries' ('try' can be a synonym of 'attempt').
'to trap' means one lot of letters goes inside another.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'on' says to put letters next to each other.
'island' becomes 'man' (Man is an example).
'tries' going around 'b' is 'tribes'.
'tribes'+'man'='TRIBESMAN'
(Other definitions for tribesman that I've seen before include "Member of traditional social group" , "For example, brave" , "Family member" , "Primitive person'" , "Society member" .)