Rate
'rate' is the definition.
(musical rhythm or rate)
This is all the clue.
(Other definitions for tempo that I've seen before include "Metronome output" , "Pace - pacing" , "Rhythm of piece of music" , "Musical beat or rhythm" , "Speed of a musical piece" .)
'rate' is the definition.
(synonyms)
This is all the clue.
(Other definitions for value that I've seen before include "Treasure" , "Estimate the worth of" , "Worth; prize" , "Intrinsic goodness" , "Cost" .)
'rate' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for class that I've seen before include "Study group" , "Elegance - form" , "School form" , "Lesson; social division" , "Opportunity to learn" .)
'rate' is the definition.
(speed is a kind of rate)
This is the entire clue.
(Other definitions for speed that I've seen before include "Swiftness" , "Film sensitivity to light" , "Rate of travel" , "A devilish quick driver?" , "Move quickly (and illegally?)" .)
'rate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for ratio that I've seen before include "One-to-one, maybe" , "Proportion of one thing to another" , "Eg, three to one" , "Quotient of two numbers" , "Relative magnitude" .)
'rate' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for grade that I've seen before include "Degree" , "Particular level of rank, quality, etc" , "one of the entertainment moguls" , "School mark" , "Rank or status" .)
'rate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for judge that I've seen before include "Decide a legal case" , "Estimate" , "Magistrate" , "Deem; arbiter" , "Assess" .)
'rate' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for pace that I've seen before include "politely expressing disagreement" , "Step or tempo" , "Clip" , "Speed of a single step?" , "Part of step" .)
'rate' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for assess that I've seen before include "Weigh up, estimate value" , "Remedy for all ills" , "Make estimate or appraisal of" , "Put a value on" , "(Of a tax) determine the amount to be paid" .)