A second US statesman perhaps, not a political enabler (8)
I believe the answer is:
assentor
'a political enabler' is the definition.
The definition suggests a singular noun which matches the answer.
'a second us statesman perhaps not' is the wordplay.
I cannot quite see how this works, but
'a' is present in the answer.
'second' could be 's' (common abbreviation) and 's' is located in the answer.
an anagram of 'not' is 'nto' which is present in the answer.
The remaining letters 'ser' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for assentor that I've seen before include "nomination endorser" , "Person expressing agreement" , "one who backs prospective candidate" .)