Feeling less clear about seat of power (6,3)

I believe the answer is:
number ten
'seat of power' is the definition.
The definition suggests a singular noun which matches the answer.
'feeling less clear about' is the wordplay.
'feeling less' becomes 'number' (more numb).
'clear' becomes 'net' (as in net profit).
'about' is a reversal indicator.
'net' reversed gives 'ten'.
'number'+'ten'='NUMBER TEN'
Can you help me to learn more?
(Other definitions for number ten that I've seen before include "as part of political address" , "Stand-off" , "Establishment of democratic power" , "Figure on the British PM's door" , ""Downing Street" is usually implied" .)
