At a fast clip (7)
I believe the answer is:
rapidly
(Other definitions for rapidly that I've seen before include "Fast" , "At a great rate" , "With great speed" , "Quickly" , "right off the bat" .)
I believe the answer is:
rapidly
(Other definitions for rapidly that I've seen before include "Fast" , "At a great rate" , "With great speed" , "Quickly" , "right off the bat" .)