Memorized (7)
I believe the answer is:
learned
'memorized' is the definition.
('learn' can be a synonym of 'memorize')
This is all the clue.
(Other definitions for learned that I've seen before include "Knowledgeable - scholarly" , "a word defining friend from Chambers?" , "Got to know" , "Erudite, knowledgeable" , "Well-educated" .)