Below; Welsh town (5)
I believe the answer is:
neath
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">below</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">welsh town</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for neath that I've seen before include "Welsh industrial town" , "Under (poetic)" , "Town near Swansea" , "town in South Wales" , "Town NE of Swansea" .)