Consisting of verses Tim Rice's rewritten, with one missing (6)
I believe the answer is:
metric
'consisting of verses tim rice's rewritten' is the definition.
I can't judge whether this defines the answer.
'with one missing' is the wordplay.
'with' is a charade indicator (letters next to each other).
'one' becomes 'me' (a setter might use 'one' to humourously mean 'me').
'missing' becomes 'tric' (I can't explain this - if you can you should believe this answer much more).
'me' put next to 'tric' is 'METRIC'.
Can you help me to learn more?
(Other definitions for metric that I've seen before include "System of weights and measures" , "Like decimal measuring system" , "Relating to verse - based on the metre" , "Of modern measuring units" , "Successor to imperial (system)" .)