Brooch (3)
'brooch' is the definition.
(decorative item pinned to clothing)
This is all the clue.
(Other definitions for pin that I've seen before include "Skittle; fix" , "Flagged stick placed in golf hole" , "Needle" , "leg" , "Tack; fasten" .)
(Other definitions for badge that I've seen before include "Identifying sign" , "Emblem, to symbolise membership perhaps" , "One cheating others with fictitious schemes" , "Insignia (of office?)" , "Emblem to denote membership" .)
'brooch' is the definition.
(I know that brooch can be written as clasp)
This is all the clue.
(Other definitions for clasp that I've seen before include "Bar on a medal ribbon" , "Hold firmly or fasten" , "Grasp firmly" , "Grasp; fastener" , "Clutch" .)