Crossword Genius

Making fast million over old craze (7)

Ross

I believe the answer is:

moorage

I'm a little stuck... Click here to teach me more about this clue!

'making fast' is the definition.
(I've seen this before)

'million over old craze' is the wordplay.
'million over old' becomes 'moo' (this might be a standard abbreviation which I don't know about).
'craze' becomes 'rage' (synonyms).
'moo'+'rage'='MOORAGE'

Can you help me to learn more?

(Other definitions for moorage that I've seen before include "Fee paid for tying up a boat" , "Charge for leaving boat" , "Place for a ship to make fast" , "Making fast" , "The price for stopping" .)

I've seen this clue in The Times.
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