Special slant identifying clothing ornament (7)
I believe the answer is:
spangle
'clothing ornament' is the definition.
(spangles might decorate clothing)
'special slant' is the wordplay.
'special' becomes 'sp' (abbreviation).
'slant' becomes 'angle' (synonyms).
'sp'+'angle'='SPANGLE'
'identifying' is the link.
(Other definitions for spangle that I've seen before include "Glittering ornament" , "Needing bit of decoration" , "Sparkling" , "it glitters" , "Colourful spot" .)