Tremble meekly concealing badge (6)
I believe the answer is:
emblem
'badge' is the definition.
(I know that badge is a type of badge)
'tremble meekly concealing' is the wordplay.
'concealing' says the answer is hidden in the clue.
'EMBLEM' is hidden in the letters of 'tremble meekly'.
(Other definitions for emblem that I've seen before include "Symbolic representation on badge etc" , "Badge, token" , "Device, badge or symbol" , "Logo" , "Typifying symbol" .)