Insular people painter's capturing I see (9)
I believe the answer is:
tahitians
'insular people' is the definition.
'Tahitians' can be an answer for 'people' (Tahitian is an example). I am unsure of the 'insular' bit.
'painter's capturing i see' is the wordplay.
'painter's' becomes 'titians' (Titian is an example).
'capturing' is an insertion indicator.
'i see' becomes 'ah' (exclamation used to indicate understanding).
'titians' placed around 'ah' is 'TAHITIANS'.
Can you help me to learn more?
(Other definitions for tahitians that I've seen before include "Polynesian types" , "Islanders in the 1 ac" , "race on island" , "some 16 [ISLANDER] s" , "some painted by Gauguin" .)