Last text remembered to an extent (7)
I believe the answer is:
extreme
'last' is the definition.
('extreme' can be a synonym of 'last')
'text remembered to an extent' is the wordplay.
'to an extent' says the answer is hidden in the clue.
'EXTREME' is hidden within 'text remembered'.
(Other definitions for extreme that I've seen before include "Inordinate" , "Most remote or utmost" , "Unrestrained" , "Very great; exceptional" , "Draconian" .)