Globe, part of regalia (3)
I believe the answer is:
orb
I believe this clue is a double definition.
'globe' is the first definition.
(I know that globe can be written as orb)
'part of regalia' is the second definition.
(I know that orb is part of regalia)
(Other definitions for orb that I've seen before include "Sovereign artefact" , "Ceremonial globe carried by a monarch" , "Jewelled ornament" , "Item of royal regalia" , "Item of insignia" .)