Getting up, little brother to turn round (3)
I believe the answer is:
orb
'turn round' is the definition.
'orb' can be an answer for 'round' (thesaurus). I'm not sure about the 'turn' bit.
'getting up little brother' is the wordplay.
'getting up' says the letters should be written backwards.
'little brother' becomes 'bro'.
'bro' reversed gives 'ORB'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for orb that I've seen before include "Item of insignia" , "Royal sphere (paired with 13 across)" , "component of royal regalia" , "A poetic eye, bro" , "Celestial body; sphere" .)