Long story about the capital of Ecuador (5)
I believe the answer is:
yearn
'long' is the definition.
(I know that long can be written as yearn)
'story about the capital of ecuador' is the wordplay.
'story' becomes 'yarn' (synonyms).
'about' means one lot of letters goes inside another.
'the capital of' suggests taking the first letters.
The first letter of 'ecuador' is 'e'.
'yarn' placed around 'e' is 'YEARN'.
(Other definitions for yearn that I've seen before include "Long - pine" , "Long (for something)" , "Curdle" , "Pant - pine" , "Have a craving" .)