Earn ton of change for PM (9)
I believe the answer is:
afternoon
'for pm' is the definition.
(as in 4pm)
'earn ton of change' is the wordplay.
'change' indicates anagramming the letters.
'earn'+'ton'+'of'='earntonof'
'earntonof' with letters rearranged gives 'AFTERNOON'.
(Other definitions for afternoon that I've seen before include "PM includes this" , "Between noon and evening" , "one not far out" , "Time of day" , "Latter part of daylight hours" .)