Easily (2,1,6)
'easily' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for hands down that I've seen before include "Passes to lower place" , "Leaves - effortlessly" , "with ease" , "extremely easily" , "Teacher's instruction after question's answered" .)
(Other definitions for by far that I've seen before include "easily" , "To a superlative extent" , "Very much" .)