Sat, less worried about decorations (7)
I believe the answer is:
tassels
'decorations' is the definition.
(tassel is a kind of decoration)
'sat less worried' is the wordplay.
'worried' indicates anagramming the letters (worry can mean to interfere with or disturb).
'sat'+'less'='satless'
'satless' anagrammed gives 'TASSELS'.
'about' acts as a link.
(Other definitions for tassels that I've seen before include "Adornments of bunches of cords" , "Ornamental bunches of cords" , "Decorations" , "Tufts of decorative hanging threads" , "Ornamental bunches of threads as on curtains" .)