Image control is working with Her Majesty ... and one of her guests? (8)
I believe the answer is:
prisoner
'one of her guests?' is the definition.
I can't judge whether this definition defines the answer.
'image control is working with her majesty' is the wordplay.
'image control' becomes 'pris' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'is working' becomes 'on'.
'with' says to put letters next to each other.
'her majesty' becomes 'er' (Elizabeth Regina).
'pris'+'on'+'er'='PRISONER'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for prisoner that I've seen before include "One captured" , "Hostage" , "One kept confined" , "Person held captive as by law" , "Captive or criminal in jail" .)