Dream about carrying weapons (5)
I believe the answer is:
armed
'carrying weapons' is the definition.
(someone carrying a weapon is armed)
'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 "brachiate?" , "Being equipped with 25 Across" , "Prepared and equipped for a confrontation" , "with Browning?" , "With a piece" .)