UnScramble this Word: a r a y t u s t?

Questions

Collective name for Peter Sellers, Harry Secombe and Spike Milligan?

One who specialises in the scientific study and regulation of food intakeand preparation?

Exercise the mind in the contemplation of spiritual matters?

A breakfast food of rolled oats, dried fruit, nuts etc usually eaten with milk?

The birthplace of Prince Phillip, uke of Edinburgh in 1921?