Country leaders in Los Angeles or Seattle (4)
I believe the answer is:
laos
'country' is the definition.
(I know that Laos is a country)
'leaders in los angeles or seattle' is the wordplay.
'leaders in' suggests taking the first letters.
The initial letters of 'los angeles or seattle' is 'LAOS'.
(Other definitions for laos that I've seen before include "Country between Thailand/Vietnam" , "Landlocked south-east Asian country" , "Asian country, capital Vientiane" , "Mountainous state in southeastern Asia" , "part of Asia" .)