Van Gogh masterpiece (6)
I believe the answer is:
irises
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">van gogh masterpiece</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for irises that I've seen before include "Eye membranes or showy flowers." , "Flags" , "Subject for van Gogh" , "Is sire in favour of flowers?" , "Coloured membranes in eyes, or showy flowers" .)