Popper with stand? (6)
I believe the answer is:
weasel
'popper with stand?' is the definition.
I can't judge whether this definition defines the answer.
'with stand?' is the wordplay.
'with' becomes 'w' (short for with).
'stand?' becomes 'easel' (stand for an artist's canvas).
'w'+'easel'='WEASEL'
(Other definitions for weasel that I've seen before include "Stoat-like mammal - treacherous type" , "Seal we turn into a long thin mammal" , "Cowardly carnivore" , "Scoundrel" , "These sort of words are meaningless" .)