Tremble holding weapons (6)
I believe the answer is:
quiver
'tremble' is the definition.
(I know that quiver is a type of tremble)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for quiver that I've seen before include "Arrow-holder; shake" , "Arrow case" , "Receptacle in which archer keeps arrows" , "Wobble" , "Tremble - case for arrows" .)