Hardly worth mentioning (7)
(Other definitions for trivial that I've seen before include "Meaningless" , "Rival it, being unimportant" , "Of little consequence" , "Very easy" , "Worthless" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hardly worth mentioning</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 nominal that I've seen before include "Ironical understatement (gram mar.)" , "Trivial" , "In name only or of token value (7)" , "In name or form only" , "Minor" .)