Like money going up! (6)
I believe the answer is:
ascent
'going up' is the definition.
(ascending means going up)
'like money' is the wordplay.
'like' becomes 'as'.
'money' becomes 'cent' (eg denomination of dollars).
'as'+'cent'='ASCENT'
(Other definitions for ascent that I've seen before include "advancement" , "Hill" , "Alpine expedition" , "Mountain path" , "Stance (anag)" .)