4 taking it out on nobleman, briefly depicting time of revolution (5,4)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Reference to 4 across SOL [it] ARY , taking out IT, then EAR [l] (nobleman) without the last letter (briefly). The time taken for one complete revolution of the Earth around the Sun (measured by observation of the Sun’s position in the sky).