Column; pier (6)
I believe the answer is:
pillar
This clue is a double definition.
'column' is the first definition.
(both can mean an upright structure)
'pier' is the second definition.
(thesaurus)
(Other definitions for pillar that I've seen before include "Column; admired member (of community)" , "Column, support" , "Supporting column" , "Tall vertical structure, of stone say" , "Vertical stone support" .)