Bad guess - not US emblems (6)
I believe the answer is:
badges
'emblems' is the definition.
(badge is a kind of emblem)
'bad guess not us' is the wordplay.
'not' indicates named letters should be taken away.
'guess' with 'us' removed is 'ges'.
'bad'+'ges'='BADGES'
(Other definitions for badges that I've seen before include "They are worn to show membership of an organisation" , "Emblems, labels" , "Emblems to signify rank or membership" , "Things worn to show membership or rank" , "Emblems of membership etc." .)