Man racing gets a little cash – wicked! (10)
I believe the answer is:
maleficent
'wicked' is the definition.
(thesaurus)
'man racing gets a little cash' is the wordplay.
'man' becomes 'm' (M is an abbreviation for male or masculine).
'racing' becomes 'lefi' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'gets' indicates putting letters inside.
'little cash' becomes 'cent' (eg small amount of cash in US coinage).
'a'+'cent'='acent'
'lefi' put inside 'acent' is 'aleficent'.
'm'+'aleficent'='MALEFICENT'
Can you help me to learn more?
(Other definitions for maleficent that I've seen before include "Evil" , "Harmful" .)