Channel synonymous with The House Government-speak (6)
I believe the answer is:
gutter
'channel' is the definition.
(gutter is a kind of channel)
'government-speak' is the wordplay.
'government' becomes 'g'.
'speak' becomes 'utter' ('utter' can be a synonym of 'speak').
'g'+'utter'='GUTTER'
'synonymous with the house' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for gutter that I've seen before include "Channel for carrying off water" , "piping?" , "Channel to carry away rainwater" , "Rain channel; (flame) start to die" , "Street channel for carrying off rainwater" .)