Regularly asked Siri about flowers (6)
I believe the answer is:
irises
'flowers' is the definition.
(I've seen this before)
'regularly asked siri about' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'about' shows that the letters should be reversed in order.
The alternate letters of 'asked' are 'se'.
'se'+'siri'='sesiri'
'sesiri' backwards is 'IRISES'.
(Other definitions for irises that I've seen before include "Subject for van Gogh" , "Flags" , "Is sire in favour of flowers?" , "blooms" , "Expensive painting" .)