Bard's river (4)
I believe the answer is:
avon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bard's river</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for avon that I've seen before include "Shakespeare its swan" , "[WILTS] flower" , "River flowing through Bristol to the Severn" , "Name of several English rivers" , "Bristol's river" .)