Speed (5)
'speed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tempo that I've seen before include "Rhythm of piece of music" , "What a metronome provides" , "Cadence" , "Speed at which piece of music is played" , "Beat (music)" .)
'speed' is the definition.
(I know that haste is a type of speed)
This is the entire clue.
(Other definitions for haste that I've seen before include "Hurry, urgency" , "Rushing (but with less speed?)" , "Urgent hurry" , "Expedition" , "The more of it, the less speed, it is said" .)
'speed' is the definition.
(the speed at which something happens)
This is the entire clue.
(Other definitions for rate that I've seen before include "See 12" , "Relative speed (of progress)" , "Fixed price or relative speed" , "Amount measured against another" , "Tear (anag.)" .)
(Other definitions for warp that I've seen before include "Go out of shape" , "Make or become out of shape" , "'Bend out of shape, with heat say (4)'" , "Pervert - distort" , "Become bent like timber through heat" .)
'speed' is the definition.
(pace is a kind of speed)
This is the entire clue.
(Other definitions for pace that I've seen before include "Speed of a single step?" , "Gait" , "Clip" , "Tempo, rate of moving" , "speed of movement" .)
'speed' is the definition.
(celerity is a kind of speed)
This is the entire clue.
(Other definitions for celerity that I've seen before include "Rapidity, speediness" , "Quickness" , "Expedition" , "Swiftness of movement" , "Haste" .)
'speed' is the definition.
(I know that speed can be written as velocity)
This is the entire clue.
(Other definitions for velocity that I've seen before include "Distance travelled per unit of time" , "Swiftness" , "Rate of motion in a specified direction" , "Speed of travel" , "Agreeable -- Riviera resort" .)