To stay inside weaving rug seems less attractive (6)
I believe the answer is:
uglier
'less attractive' is the definition.
(I've seen this before)
'to stay inside weaving rug' is the wordplay.
'to stay' becomes 'lie'.
'inside' means one lot of letters goes inside another.
'weaving' indicates an anagram.
'rug' with letters rearranged gives 'ugr'.
'lie' placed into 'ugr' is 'UGLIER'.
'seems' is the link.
(Other definitions for uglier that I've seen before include "with worse features" , "More unattractive or repellent to the eye" , "More hideous" , "More offensive to look at" , "Not so pretty" .)