Declares leader of Ecuador is disinclined (6)
I believe the answer is:
averse
'is disinclined' is the definition.
(similar in meaning)
'declares leader of ecuador' is the wordplay.
'declares' becomes 'avers' (averring is a kind of declaring).
'leader of' indicates taking the first letters.
The initial letter of 'ecuador' is 'e'.
'avers'+'e'='AVERSE'
(Other definitions for averse that I've seen before include "Disinclined - as ever (anag)" , "Indisposed" , "'Opposed, disinclined (6)'" , "Not in favour of" , "Reaves (anag)" .)