Good progress needed in shifting early architectural feature (8)
I believe the answer is:
gargoyle
'architectural feature' is the definition.
(gargoyle is a type of architectural feature)
'good progress needed in shifting early' is the wordplay.
'good' becomes 'g' (abbreviation).
'progress' becomes 'go' (I've seen this in other clues).
'needed in' means one lot of letters goes inside another.
'shifting' indicates anagramming the letters.
'early' anagrammed gives 'aryle'.
'go' inserted within 'aryle' is 'argoyle'.
'g'+'argoyle'='GARGOYLE'
(Other definitions for gargoyle that I've seen before include "Grotesque projection" , "grotesque sight!" , "Ugly carved figure on a building" , "Grotesque face of the gutter" , "Ugly spouting face?" .)