Stand below with sly type (6)
I believe the answer is:
weasel
'sly type' is the definition.
(I've seen this before)
'stand below with' is the wordplay.
'stand' becomes 'easel' (stand for an artist's canvas).
'below' says to put letters next to each other (in a down clue, some letters go below others).
'with' becomes 'w' (short for with).
'easel' after 'w' is 'WEASEL'.
(Other definitions for weasel that I've seen before include "Equivocate - small animal" , "Stoat's relative" , "Musteline animal" , "These sort of words are meaningless" , "Scoundrel" .)