Is sire out of these flowers? (6)
I believe the answer is:
irises
'is sire out of these flowers?' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for irises that I've seen before include "Expensive painting" , "Flowers painted by Van Gogh" , "Coloured membranes in eyes, or showy flowers" , "Subject for van Gogh" , "Flags" .)