Name a second coin that's emerging (7)
I believe the answer is:
nascent
'emerging' is the definition.
('nascent' can be a synonym of 'emerging')
'name a second coin' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'a second' becomes 'as' (I've seen this in other clues).
'coin' becomes 'cent' (cent is a kind of coin).
'n'+'as'+'cent'='NASCENT'
'that's' is the link.
(Other definitions for nascent that I've seen before include "Promising potential" , "starting to mature" , "Budding early" , "Starting to develop" , "Coming into existence" .)