One who can't remember me, as I can recollect (8)
I believe the answer is:
amnesiac
'one who can't remember' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'me as i can recollect' is the wordplay.
'recollect' indicates an anagram.
'me'+'as'+'i'+'can'='measican'
'measican' with letters rearranged gives 'AMNESIAC'.
Can you help me to learn more?
(Other definitions for amnesiac that I've seen before include "One suffering from loss of memory" , "One suffers from memory loss" , "Forgetful person" , "Experiencing a fugue" , "Unaware of past" .)