Fresh enthusiasm comes with an introduction to delightful country (3,7)
I believe the answer is:
new zealand
'country' is the definition.
(New Zealand is an example)
'fresh enthusiasm comes with an introduction to delightful' is the wordplay.
'fresh' becomes 'new' (synonyms).
'enthusiasm' becomes 'zeal' (zeal is a kind of enthusiasm).
'comes with' is a charade indicator (letters next to each other).
'introduction to' suggests taking the first letters.
The initial letter of 'delightful' is 'd'.
'new'+'zeal'+'an'+'d'='NEW ZEALAND'
(Other definitions for new zealand that I've seen before include "Zelanian things originate here" , "Commonwealth country" , "Land of the kiwi" , "Antipodean country" , "[TEST TEAM]" .)