Come together in some ethereal way (4)
I believe the answer is:
meet
'come together' is the definition.
(to meet is to gather or come together)
'in some ethereal way' is the wordplay.
'in' indicates the answer is hidden within the clue.
'MEET' is hidden within 'some ethereal way'.
(Other definitions for meet that I've seen before include "assembly at hunt" , "Right and fitting" , "Fitting - encounter" , "Converge" , "acceptable" .)