Part of the column is to do with the stars including legend from America (8)
I believe the answer is:
astragal
'part of the column' is the definition.
'astragal' can be an answer for 'part' (astragal is a kind of part). I'm not certain of the 'of the column' bit.
'to do with the stars including legend from america' is the wordplay.
'to do with the stars' becomes 'astral' (I've seen this before).
'including' indicates putting letters inside.
'legend' becomes 'g' (leg-end - end letter of 'leg').
'from' says to put letters next to each other.
'america' becomes 'a' (common abbreviation - e.g. in organisation names).
'g'+'a'='ga'
'astral' going around 'ga' is 'ASTRAGAL'.
'is' is the link.
Can you help me to learn more?
(Other definitions for astragal that I've seen before include "wooden strip" , "Beaded moulding for edging furniture" .)