On the up and up (5)
(Other definitions for legit that I've seen before include "allowed by law, shortly!" , "Genuine" , "Lawful, in short" , "Authorised" , "true, in a word?" .)
(Other definitions for rising that I've seen before include "Revolt; increasing" , "Ascension" , "Sloping up; rebellion" , "Approaching the age of" , "Armed revolt against authority" .)