Tossing coins on first-class return from capital (7)
I believe the answer is:
nicosia
'capital' is the definition.
(Nicosia is an example)
'tossing coins on first-class return' is the wordplay.
'tossing' indicates anagramming the letters.
'on' says to put letters next to each other.
'first class' becomes 'ai' (A1 - top quality).
'return' shows that the letters should be reversed in order.
'ai' reversed gives 'ia'.
'coins' with letters rearranged gives 'nicos'.
'nicos'+'ia'='NICOSIA'
'from' is the link.
(Other definitions for nicosia that I've seen before include "Casino I used in Cyprus" , "European Union's most southerly capital" , "Casino I visit in Cyprus" , "capital city" , "Divided Cypriot capital" .)