One held in contempt to stop call for decoration (6)
I believe the answer is:
tassel
'decoration' is the definition.
(tassel is a kind of decoration)
'one held in contempt to stop call' is the wordplay.
'one held in contempt' becomes 'ass' (contemptuous term for a stupid person).
'to stop' indicates putting letters inside.
'call' becomes 'tel' (short for telephone).
'ass' placed into 'tel' is 'TASSEL'.
'for' acts as a link.
(Other definitions for tassel that I've seen before include "Slates (anag)" , "Hanger-on perhaps" , "Decorative tuft of threads" , "Hanging ornament" , "Mortar board attachment" .)