Actors brought to the French monument? (6)
I believe the answer is:
castle
'monument?' is the definition.
(a castle might be a monument)
'actors brought to the french' is the wordplay.
'actors' becomes 'cast' (group of actors).
'brought to' means one lot of letters go next to another.
'the french' becomes 'le' ('the' in French).
'cast'+'le'='CASTLE'
(Other definitions for castle that I've seen before include "making a move" , "Big building" , "Fortress; rook" , "Fort" , "Chateau" .)