Reminder of lost teen flicks (4,2,4)
I believe the answer is:
note to self
'reminder' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'of lost teen flicks' is the wordplay.
'flicks' indicates anagramming the letters (to flick can mean to cause movement).
'of'+'lost'+'teen'='oflostteen'
'oflostteen' is an anagram of 'NOTE TO SELF'.
Can you help me to learn more?
(Another definition for note to self that I've seen is " For jogging, I might make this".)