Execute for each favourite speed (10)
I believe the answer is:
perpetrate
'execute' is the definition.
(thesaurus)
'each favourite speed' is the wordplay.
'each' becomes 'per' ('per' can mean for each).
'favourite' becomes 'pet' (synonyms).
'speed' becomes 'rate' (both can mean pace).
'per'+'pet'+'rate'='PERPETRATE'
'for' acts as a link.
(Other definitions for perpetrate that I've seen before include "perform" , "Commit (a bad action)" , "Carry out, commit" , "Act" , "Commit (crime)" .)