"Hawaii Five-O" locale (4)
I believe the answer is:
oahu
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hawaii five-o locale</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oahu that I've seen before include "Pacific island" , "popular Pacific location" , "Chief island of Hawaii" , "Hawaiian island" , "Honolulu's island" .)