Poet has no right to internalise American apprehension (8)
I believe the answer is:
suspense
'apprehension' is the definition.
(I know that suspense is a type of apprehension)
'poet has no right to internalise american' is the wordplay.
I cannot really see how this works, but
'no' could be 'n' (common abbreviation y/n) and 'n' is found within the answer.
'american' could be 'us' (abbreviation for United States) and 'us' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for suspense that I've seen before include "Apprehension, anticipation" , "Doubt" , "The 3 of having to wait" , "Discontinuance - indecision - excitement" , "Nervous anticipation" .)