Fresh endless belt in column (5)
I believe the answer is:
newel
'column' is the definition.
(I know that newel is a type of column)
'fresh endless belt' is the wordplay.
'fresh' becomes 'new' (synonyms).
'endless' says to take the centre.
The middle of 'belt' is 'el'.
'new'+'el'='NEWEL'
'in' acts as a link.
(Other definitions for newel that I've seen before include "(Of a flight) upright post" , "Support post for stair rail" , "End post on stair rail" , "Yucatan native" , "Post supporting stair rail" .)