Kentucky fort (4)
I believe the answer is:
knox
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kentucky fort</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 knox that I've seen before include "Fort . . . . holds the USA's gold bullion" , "John --, Scottish religious reformer" , "See 21" , "Scotttish churchman" , "See 24 Down" .)