Americans discontented with tragic president (5)
I believe the answer is:
assad
'americans discontented' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'tragic president' is the wordplay.
I cannot really see how this works, but
'tragic' could be 'sad' ('sad' can be similar in meaning to 'tragic') and 'sad' is found in the answer.
The remaining letters 'as' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'with' acts as a link.
Can you help me to learn more?
(Another definition for assad that I've seen is " Arab leader".)