Full of love, makes fuss over symbol of engagement (7)
I believe the answer is:
adoring
'full of love makes' is the definition.
I can't judge whether this definition defines the answer.
'fuss over symbol of engagement' is the wordplay.
'fuss' becomes 'ado' (synonyms).
'over' is a charade indicator (letters next to each other) (in a down clue, some letters go over others).
'symbol of engagement' becomes 'ring' (I can't justify this - if you can you should believe this answer much more).
'ado'+'ring'='ADORING'
Can you help me to learn more?
(Other definitions for adoring that I've seen before include "Worshipping the loved one" , "Holding dear" , "Devoted" , "Loving deeply" , "Greatly loving" .)