Swiftly (4,3,4)
'swiftly' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for apace that I've seen before include "At a rapid rate" , "at high speed" , "Quick" , "What's quickly" , "fast" .)
(Other definitions for like the wind that I've seen before include "prefer flutes, etc" , "Enjoy being blown about" , "at top speed" , "Fleet" , "... fast" .)
'swiftly' is the definition.
(synonyms)
This is all the clue.
(Other definitions for rapidly that I've seen before include "At a great rate" , "right off the bat" , "With great speed" , "Speedily" , "Fast" .)