Carefully move large oil holder, perhaps (5)
I believe the answer is:
easel
'oil holder perhaps' is the definition.
I can't judge whether this definition defines the answer.
'carefully move large' is the wordplay.
'carefully move' becomes 'ease' (easing is a kind of moving. I am not sure about the 'carefully' bit.).
'large' becomes 'L' (eg in clothes sizes).
'ease'+'l'='EASEL'
Can you help me to learn more?
(Other definitions for easel that I've seen before include "Van Gogh's stand?" , "Artist's prop" , "Framework to hold a canvas" , "stand supporting artistic effort" , "Artist's tripod" .)