Train to help and support a VIP (7)
I believe the answer is:
retinue
'train' is the definition.
(people following someone in a procession)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for retinue that I've seen before include "Group of attendants for VIP" , "Group following an important person" , "company" , "Body of retainers" , "Group attending a person" .)