Big name in TV ratings (7)
I believe the answer is:
nielsen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">big name in tv ratings</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 nielsen that I've seen before include "Danish symphonist" , "Musician" , "Carl -, Danish cmpsr." , "Danish composer, Carl (1865-1931)" , "Leslie --, Canadian actor" .)