Something that jogs the memory about bodyguard (8)

I believe the answer is:

reminder

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'something that jogs the memory' is the definition.
I can't judge whether this defines the answer.

'about bodyguard' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'bodyguard' becomes 'minder' (I've seen this before).
're'+'minder'='REMINDER'

Can you help me to learn more?

(Other definitions for reminder that I've seen before include "Nudge" , "Memento" , "Memory jogger" , "Memory refresher" , "note" .)

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