Hint about bodyguard (8)
I believe the answer is:
reminder
'hint' is the definition.
(I've seen this before)
'about bodyguard' is the wordplay.
'about' becomes 're' (regarding).
'bodyguard' becomes 'minder' (I've seen this before).
're'+'minder'='REMINDER'
(Other definitions for reminder that I've seen before include "Memory refresher" , "Aide-mmoire" , "Nudge" , "Memory jogger" , "note" .)