The emphases are on power and money (7)
I believe the answer is:
accents
'the emphases' is the definition.
('accent' can be a synonym of 'emphasis')
'are on power and money' is the wordplay.
'are' becomes 'a' (short for 'are', historical unit of measurement).
'on power' becomes 'cents' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'money' becomes 'c'.
'cents' after 'c' is 'ccents'.
'a'+'ccents'='ACCENTS'
Can you help me to learn more?
(Other definitions for accents that I've seen before include "Strongly contrasting details" , "Brogues" , "Local ways of speaking" , "Dialects, articulations" , "graves?" .)