Say from memory (6)
I believe the answer is:
recite
'say from memory' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for recite that I've seen before include "Declaim from memory" , "Render verbally" , "Repeat aloud form memory( 6)" , "Repeat aloud from memory, say a poem" , "Repeat aloud from memory, say poetry" .)