Exclamation of surprise from Briton, getting fruit that's heart-shaped (7)
I believe the answer is:
cordate
'that's heart-shaped' is the definition.
(synonyms)
'exclamation of surprise from briton getting fruit' is the wordplay.
'exclamation of surprise' becomes 'cor' (expression of surprise).
'from' is a charade indicator (letters next to each other).
'briton getting fruit' becomes 'date' (I am not sure about this - if you are sure you should believe this answer much more).
'cor'+'date'='CORDATE'
Can you help me to learn more?
(Another definition for cordate that I've seen is " Heart-shaped; Art Deco (anag.)".)