Left port full (5)
I believe the answer is:
laden
'full' is the definition.
(similar in meaning)
'left port' is the wordplay.
'left' becomes 'l' (common abbreviation).
'port' becomes 'aden' (port in Yemen).
'l'+'aden'='LADEN'
(Other definitions for laden that I've seen before include "Like cargo boat" , "packed with cargo" , "Like many a cargo ship" , "Filled (with)" , "Freighted" .)