Glasgow’s river (5)
I believe the answer is:
clyde
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">glasgow's river</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 clyde that I've seen before include "Major Scottish river" , "Glaswegian river" , "Flower of Scotland" , "One running between banks" , "Forth and - canal" .)