Jog one's memory (6)
I believe the answer is:
remind
'jog one's memory' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for remind that I've seen before include "Prompt, assist someone to remember" , "Cause someone to remember" , "Prompt; cue" , "Warn" , "Jog one's memory" .)