Stands in line and moves gently around it (6)
I believe the answer is:
easels
'stands in line' is the definition.
'easels' can be an answer for 'stands' (artists' stands). I'm not sure about the 'in line' bit.
'moves gently around it' is the wordplay.
'moves gently' becomes 'eases' ('ease' can be a synonym of 'move gently').
'around' is an insertion indicator.
'it' becomes 'l' (I can't justify this - if you can you should give a lot more credence to this answer).
'eases' enclosing 'l' is 'EASELS'.
'and' is the link.
(Other definitions for easels that I've seen before include "Artists' supports" , "Leases (anag)" , "Painters' stands" , "Stands for blackboards, artists' paintings etc" , "Supports in the studio" .)