Columbus discovery of 1493 (7)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">columbus discovery of 1493</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for antigua that I've seen before include "former British possession" , "West Indies island" , "Largest of Leeward Is." , "Aga unit in the West Indies" , "One of the Leeward Islands" .)