Rob made new sphere (3)
I believe the answer is:
orb
'new sphere' is the definition.
'orb' can be an answer for 'sphere' (orb is a kind of sphere). I'm unsure of the 'new' bit.
'rob made' is the wordplay.
'made' indicates an anagram.
'rob' is an anagram of 'ORB'.
Can you help me to learn more?
(Other definitions for orb that I've seen before include "Sovereign artefact" , "Part of royal regalia" , "A poetic eye, bro" , "component of royal regalia" , "Sphere for a sovereign" .)