Preferably (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">preferably</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rather that I've seen before include "To a limited degree" , "Pretty" , "Quite; on the contrary" , "Prefer" , "Infinite time" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">preferably</span>' is the definition.<br/ ><span class="explanation-format__explanation">(eg 'I'd sooner sit' means 'I would prefer to sit')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sooner that I've seen before include "nickname of US State" , "Earlier or preferably" , "More readily; earlier" , "native of Oklahoma" , "Earlier than previously thought" .)