Reminders to look up benefits (9)
I believe the answer is:
keepsakes
'reminders' is the definition.
(I've seen this in another clue)
'look up benefits' is the wordplay.
'look up' becomes 'keep' (I've seen this in other clues).
'benefits' becomes 'sakes' (sake is a kind of benefit).
'keep'+'sakes'='KEEPSAKES'
'to' acts as a link.
(Other definitions for keepsakes that I've seen before include "Seventeen [MEMORABILIA]" , "Mementoes" , "Mementos" , "Souvenirs" , "Relics" .)