To move viceroy the French detective stared (7)

'stared' is the definition.
The answer and definition can be both to do with perception as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

'to move viceroy the french detective' is the wordplay.
I cannot really understand how this works, but
'move' could be 'go' (to go is to move) and 'go' is located in the answer.
'the french' could be 'le' ('the' in French) and 'le' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?