Cue from soldiers and bodyguard (8)
I believe the answer is:
reminder
'cue' is the definition.
(thesaurus)
'soldiers and bodyguard' is the wordplay.
'soldiers' becomes 'RE' (Royal Engineers).
'and' is a charade indicator (letters next to each other).
'bodyguard' becomes 'minder' (I've seen this before).
're'+'minder'='REMINDER'
'from' is the link.
(Other definitions for reminder that I've seen before include "Hint, suggestion" , "Memory-jogger" , "Memo - souvenir" , "Aide-memoire" , "Memory refresher" .)