Liberal composed letters to read with feeling (7)

I believe the answer is:

braille

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'letters to read with feeling' is the definition.
I can't tell whether this defines the answer.

'liberal composed' is the wordplay.
'composed' indicates an anagram.
'liberal' anagrammed gives 'BRAILLE'.

Can you help me to learn more?

(Other definitions for braille that I've seen before include "Language using touch" , "Writing system for the blind" , "Uneven writing" , "System of writing for sightless people" , "Touching language" .)

I've seen this clue in The Times.

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