Echo called about our being in love! (9)
I believe the answer is:
enamoured
'in love' is the definition.
(I've seen this before)
'echo called about our' is the wordplay.
'echo' becomes 'e' (phonetic alphabet: alpha, bravo, charlie etc.).
'called' becomes 'named' ('name' can be a synonym of 'call').
'about' indicates putting letters inside.
'named' placed around 'our' is 'namoured'.
'e'+'namoured'='ENAMOURED'
'being' is the link.
(Other definitions for enamoured that I've seen before include "Charmed" , "Filled with love" , "Besotted" , "Bewitched" , "Greatly taken with" .)