Crime could make one fly (6)
I believe the answer is:
felony
'crime' is the definition.
(I know that felony is a type of crime)
'make one fly' is the wordplay.
'make' indicates anagramming the letters.
'one'+'fly'='onefly'
'onefly' with letters rearranged gives 'FELONY'.
'could' is the link.
(Other definitions for felony that I've seen before include "Serious crime" , "Criminal act" , "Grave crime" , "Criminal offence" .)