Actors were first to have made a move on board (7)
I believe the answer is:
castled
'to have made a move on board' is the definition.
I can't judge whether this defines the answer.
'actors were' is the wordplay.
'actors' becomes 'cast' (group of actors).
'were' becomes 'led' (leading is a kind of being).
'cast'+'led'='CASTLED'
'first' is the link.
Can you help me to learn more?
(Other definitions for castled that I've seen before include "Made a chess move" , "have moved on board" , "Performed chess move" , "defensive move" , "Moved king into safety" .)
