Fact-filled reference (7)
I believe the answer is:
almanac
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fact-filled reference</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 almanac that I've seen before include "Annual publication providing information like Old Moore's" , "Indicates dates" , "Annual publication containing information in a particular field" , "issue every year" , "Year book with astronomical events, tides etc" .)