Not often (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not often</span>' is the definition.<br/ ><span class="explanation-format__explanation">('rarely' is the opposite to 'often')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rarely that I've seen before include "Seldom, not frequently" , "when hundred-to-one horse wins?" , "Not done or occurring very often" , "once in a blue moon" , "Gas used in fluorescent signs" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not often</span>' is the definition.<br/ ><span class="explanation-format__explanation">('seldom' is the opposite to 'often')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for seldom that I've seen before include "Alluvium" , "Not very often, rarely" , "Not 21" , "Once in a blue moon" , "Models (anag)" .)