Wrote about tall building (5)
I believe the answer is:
tower
'tall building' is the definition.
(I've seen this before)
'wrote about' is the wordplay.
'about' is an anagram indicator.
'wrote' anagrammed gives 'TOWER'.
(Other definitions for tower that I've seen before include "Turret" , "Tall feature of Blackpool" , "One to pull" , "Tall structure" , "Drawer" .)