Awfully poor housing built badly for Moscow executive (9)
I believe the answer is:
politburo
'moscow executive' is the definition.
(governmental organisation in the Soviet Union)
'awfully poor housing built badly' is the wordplay.
'awfully' indicates anagramming the letters.
'housing' is an insertion indicator.
'badly' indicates anagramming the letters (letters in the wrong order).
'poor' anagrammed gives 'poro'.
'built' is an anagram of 'litbu'.
'poro' going around 'litbu' is 'POLITBURO'.
'for' acts as a link.
(Other definitions for politburo that I've seen before include "Ruling Soviet committee" , "21 [SOVIET] structure" , "Soviet leaders" , "Commie leaders" , "party executive" .)