Firm in time makes money (7)
I believe the answer is:
coinage
'money' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for coinage that I've seen before include "Fresh bit of language" , "in notes? No" , "Metal currency" , "Royal Mint's output" , "for the new term" .)