In general, it keeps you out of the draught (3)
I believe the answer is:
lee
This might be a double definition.
'in general' is the first definition.
'lee' can be an answer for 'general' (Robert E. Lee - US revolutionary commander). I'm unsure of the 'in' bit.
'it keeps you out of the draught' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for lee that I've seen before include "Area sheltered from the wind" , "Sheltered from the wind in Cork, perhaps" , "The side that's sheltered from the wind" , "Shelter" , "Revolutionary general" .)