Mike Catt says Ireland won't allow Blair Kinghorn to play "in his dinner suit" as the hosts aim is to make the novice no 10 at Test level endure a tough day at the Aviva Stadium.
Kinghorn played his schoolboy rugby as an out-half but, at professional level, is a regular back three player.
He has been converted back to out-half this season at club level with Edinburgh, where he has played eight games in 10 games in the pivot role.