Anglo-Saxon kingdom (5)
I believe the answer is:
essex
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">anglo-saxon kingdom</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 essex that I've seen before include "Home county" , "County NE of London" , "Favourite of Elizabeth I" , "R. Devereux, Earl of -" , "Stereotypical promiscuous and materialistic young woman (from Colchester?)" .)