Romantic declaration of a pusher? (5)
I believe the answer is:
ideal
'romantic' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ideal that I've seen before include "Utopian; yardstick" , "'Perfect, model (5)'" , "The best conceivable" , "example" , "Model of perfection" .)