Wrote about in column (5)
I believe the answer is:
tower
'column' is the definition.
(I have seen 'Tall column ' mean 'tower' so perhaps 'column' could also mean 'tower')
'wrote about' is the wordplay.
'about' indicates anagramming the letters.
'wrote' is an anagram of 'TOWER'.
'in' is the link.
(Other definitions for tower that I've seen before include "Pisa has a leaning one" , "Rise to great height" , "Drawer" , "Monument" , "See 4 Down" .)