Country leaders in Los Angeles or Seattle (4)
'country' is the definition.
(Laos is an example)
'leaders in los angeles or seattle' is the wordplay.
'leaders in' says to take the initial letters.
The first letters of 'los angeles or seattle' is 'LAOS'.
(Other definitions for laos that I've seen before include "Republic in southeastern Asia", "Mountainous state in southeastern Asia", "Country between Thailand/Vietnam", "South-east Asian republic, capital Vientiane", "Country of SE Asia".)