Crossword Genius

Rich, released from Further Education, revolutionised capacity (5)

Ross

I believe the answer is:

litre

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

'capacity' 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 litre that I've seen before include "1.7598 UK pints" , "Metric measure of capacity" , "Metric liquid measure" , "Metric unit of volume" , "French volume" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app