Perennial digital assistant returns (4)
I believe the answer is:
iris
'perennial' is the definition.
(perennial plant)
'digital assistant returns' is the wordplay.
'digital assistant' becomes 'siri' (assistant on Apple devices).
'returns' shows that the letters should be reversed in order.
'siri' written backwards gives 'IRIS'.
(Other definitions for iris that I've seen before include "Lily" , "Bright flower or eye part" , "Woman" , "Nice flower or eye part" , "- - Murdoch, novelist" .)