Dream about bearing weapons (5)
I believe the answer is:
armed
'bearing weapons' is the definition.
(I've seen this before)
'dream about' is the wordplay.
'about' indicates an anagram.
'dream' with letters rearranged gives 'ARMED'.
(Other definitions for armed that I've seen before include "Supplied with weapons" , "brachiate?" , "prepared to shoot?" , "Being equipped with 25 Across" , "Carrying a weapon" .)