Lyricist's after power charge (5)
I believe the answer is:
price
'charge' is the definition.
(I've seen this in another clue)
'lyricist's after power' is the wordplay.
'lyricist' becomes 'Rice' (Sir Tim Rice).
'after' says to put letters next to each other.
'power' becomes 'p' (symbol in physics).
'rice' put after 'p' is 'PRICE'.
(Other definitions for price that I've seen before include "Cost of purchase" , "Monetary value" , "What has to be paid" , "Amount for which a thing is sold" , "Cost of an item" .)