Support for painting from moderate Labour leader (5)
I believe the answer is:
easel
'support for painting' is the definition.
'easel' can be an answer for 'support' (I've seen this before). I'm not sure about the 'for painting' bit.
'moderate labour leader' is the wordplay.
'moderate' becomes 'ease' (moderate can mean to relax or ease).
'labour leader' becomes 'l' (the leading letter of 'labour').
'ease'+'l'='EASEL'
'from' acts as a link.
Can you help me to learn more?
(Other definitions for easel that I've seen before include "Artist's prop" , "Constable's supporter" , "stand for creativity" , "Three-legged supporting frame" , "Stand in a studio" .)