Garden of England (4)
I believe the answer is:
kent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">garden of england</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for kent that I've seen before include "Canterbury's county" , "County, garden of England" , "South-eastern county" , "Home county" , "Part of 1 25 [KING LEAR]" .)