Enticement to run motoring organisation is rejected (6)
I believe the answer is:
carrot
'enticement' is the definition.
(I've seen this before)
'to run motoring organisation is rejected' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'motoring organisation' becomes 'rac' (short for Royal Automobile Club).
'is rejected' is a reversal indicator.
'to'+'r'+'rac'='torrac'
'torrac' reversed gives 'CARROT'.
(Other definitions for carrot that I've seen before include "Vegetable to entice the donkey" , "The vegetable to induce" , "Orange vegetable" , "orangey colour" , "One prov. used to encourage" .)