Cathedral city in Devon (6)
I believe the answer is:
exeter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cathedral city in devon</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for exeter that I've seen before include "County town and cathedral city of Devon" , "SW English city" , "City at S. end of M five" , "Devonshire city" , "Devon's county town" .)