Govern in bad weather we hear (5)
I believe the answer is:
reign
'govern' is the definition.
(I know that reign is a type of govern)
'bad weather we hear' is the wordplay.
'bad weather' becomes 'rain' (rain is an example of bad weather).
'we hear' shows a homophone (sound like).
'rain' sounds like 'REIGN'.
'in' is the link.
(Other definitions for reign that I've seen before include "Hegemony" , "Rule of monarch" , "Be champion" , "Period of a monarchy" , "Sit on a throne" .)