Things one's carrying came across from the East (5)
I believe the answer is:
items
'things' is the definition.
(I've seen this before)
'one's carrying came across from the east' is the wordplay.
'one's' becomes 'is' (Roman numeral).
'carrying' means one lot of letters goes inside another.
'came across' becomes 'met' ('meet' can be a synonym of 'come across').
'from the east' says the letters should be written backwards.
'met' written backwards gives 'tem'.
'is' going around 'tem' is 'ITEMS'.
(Other definitions for items that I've seen before include "Individual parts" , "Bits of news" , "Articles or units on a list" , "Individual articles" , "separate parts of news bulletin" .)