Islander Venetian artist has captured I see! (8)
I believe the answer is:
tahitian
'islander' is the definition.
(someone from Tahiti)
'venetian artist has captured i see' is the wordplay.
'venetian artist' becomes 'Titian' (painter and member of the Venetian school).
'has captured' means one lot of letters goes inside another.
'i see' becomes 'ah' ('ah' can be used to express understanding).
'titian' placed around 'ah' is 'TAHITIAN'.
(Other definitions for tahitian that I've seen before include "someone on tropic island" , "One from Papeete" , "It, in a hat (anag)" , "From French Polynesia" , "Polynesian islander" .)