Drinking on the way to seat of power (7,6)
I believe the answer is:
downing street
'seat of power' is the definition.
The definition suggests a singular noun which matches the answer.
'drinking on the way' is the wordplay.
'drinking' becomes 'downing' (as in downing a drink).
'on' says to put letters next to each other.
'the way' becomes 'street' (street is a kind of way).
'downing'+'street'='DOWNING STREET'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for downing street that I've seen before include "The (British) government" , "UK seat of government" , "PM's address -- enters, got wind (anag)" , "gated community?" , "No 10's location" .)