Echo encountered in ravine in Washington? (6)
I believe the answer is:
george
'washington?' is the definition.
('George Washington' can be a synonym of 'washington')
'echo encountered in ravine' is the wordplay.
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'encountered in' means one lot of letters goes inside another.
'ravine' becomes 'gorge' (gorge is a kind of ravine).
'e' inserted inside 'gorge' is 'GEORGE'.
'in' acts as a link.
(Other definitions for george that I've seen before include "people swear by" , "Beatle" , "Boy --; -- Clooney" , "Dragon-slaying saint" , "one in 3 the 12 30 [DROP the DEAD DONKEY]" .)