Left Yemeni port carrying cargo (5)
I believe the answer is:
laden
'carrying cargo' is the definition.
(I've seen this in another clue)
'left yemeni port' is the wordplay.
'left' becomes 'l' (common abbreviation).
'yemeni port' becomes 'aden' (I've seen this in another clue).
'l'+'aden'='LADEN'
(Other definitions for laden that I've seen before include "Loaded with cargo or burden" , "charged a lot" , "Put on board" , "Like many a cargo ship" , "Filled (with)" .)