Certain about cent being Ecuador's currency (5)
I believe the answer is:
sucre
'ecuador's currency' is the definition.
'sucre' can be an answer for 'currency' (I have seen 'Ecuadorean currency ' mean 'sucre' so perhaps 'currency' could also mean 'sucre'). I am not certain of the 'ecuador's' bit.
'certain about cent' is the wordplay.
'certain' becomes 'sure' (synonyms).
'about' indicates putting letters inside.
'cent' becomes 'c'.
'sure' enclosing 'c' is 'SUCRE'.
'being' is the link.
Can you help me to learn more?
(Other definitions for sucre that I've seen before include "S American capital" , "Bolivian city" , "City of Bolivia" , "Ecuadorean currency; sugar (French)" , "Bolivia's constitutional capital" .)