Money as would be needed for rises (5)
I believe the answer is:
cents
'needed for rises' is the definition.
Although both the answer and definition are plural nouns, I cannot see how one could define the other.
'money as' is the wordplay.
'money' becomes 'cent' (eg denomination of dollars).
'as' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'cent'+'s'='CENTS'
'would be' acts as a link.
Can you help me to learn more?
(Other definitions for cents that I've seen before include "US money, e.g." , "American coins" , "Fractions of dollar" , "money abroad" , "Hundredths of dollar" .)