Decorative strip of fabric (6)
(Other definitions for ribbon that I've seen before include "Long strip of fabric" , "Long, narrow band" , "Narrow strip of coloured cloth, worn as ornament" , "Material tied in a bow, perhaps?" , "Headband" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">decorative strip of fabric</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 riband that I've seen before include "strip of fabric" , "Four across - is trophy for fastest Atlantic sea crossing" , "decorative strip" , "Strip of material" .)