Yes-man in the majority in Congress? (10,5)
I believe the answer is:
consenting adult
'majority in congress?' is the definition.
The definition suggests a singular noun which matches the answer.
'yes-man in the' is the wordplay.
I cannot quite see how this works, but
'man' could be 'con' and 'con' is present in the answer.
'in' is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for consenting adult that I've seen is " Mature type willing to have sex".)