The morning? Not sure I can get a yank (8)
I believe the answer is:
american
'yank' is the definition.
(I've seen this in another clue)
'the morning? not sure i can get a' is the wordplay.
'the morning?' becomes 'am' (as in er:00 AM).
'not sure i can' becomes 'eric' (I can't justify this - if you can you should give a lot more credence to this answer).
'get' is a charade indicator (letters next to each other).
'a' becomes 'an'.
'am'+'eric'+'an'='AMERICAN'
Can you help me to learn more?
(Other definitions for american that I've seen before include "Nationality of Yankee Doodle Dandy" , "Main race confused in USA" , "Film starring Kevin Spacey" , "Native to the USA" , "like Buffalo Bill" .)