Order for building one’s given to men in Washington (5)
I believe the answer is:
doric
'order' is the definition.
(Doric order is a classical architectural order)
'building one's given to men in washington' is the wordplay.
'building one' becomes 'i' (Roman numeral. I am not sure about the 'building' bit.).
'given' means one lot of letters go next to another.
'to men' becomes 'OR' (military abbreviation for Other Ranks).
'in' is an insertion indicator.
'washington' becomes 'dc' (Washington DC).
'i' after 'or' is 'ori'.
'ori' going into 'dc' is 'DORIC'.
'for' is the link.
Can you help me to learn more?
(Other definitions for doric that I've seen before include "Type of column" , "In a classical Greek style of architecture" , "Relating to a classical order of architecture" , "A classical style of architecture with fluted columns" , "Denoting a classic Greek style" .)