Crossword Genius

Printing system in liberal revamp (7)

Ross

I believe the answer is:

braille

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'printing system' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'liberal revamp' is the wordplay.
'revamp' is an anagram indicator (I've seen 'revamped' mean this).
'liberal' is an anagram of 'BRAILLE'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for braille that I've seen before include "French educationist" , "Raised text for the blind" , "Touching language" , "System of writing for sightless people" , "Raised type for blind people" .)

I've seen this clue in The Times.
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