Stand in a studio, or move slowly left (5)
I believe the answer is:
easel
'stand in a studio' is the definition.
(I've seen this in another clue)
'move slowly left' is the wordplay.
'move slowly' becomes 'ease' (easing is a kind of moving. I am not sure about the 'slowly' bit.).
'left' becomes 'l' (common abbreviation).
'ease'+'l'='EASEL'
'or' is the link.
Can you help me to learn more?
(Other definitions for easel that I've seen before include "artist's requisite" , "Lease (anag)" , "Support for artist's canvas" , "stand supporting artistic effort" , "Painter's frame" .)