Eye piece from virtual assistant swivelling around (4)
I believe the answer is:
iris
'eye piece' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for iris that I've seen before include "Circular coloured membrane in the eye" , "Flag - surrounding pupil" , "Flag or flower in the eye" , "Woman" , "--- Murdoch, author" .)