Managed to get one in bad weather (4)
I believe the answer is:
rain
'bad weather' is the definition.
(rain is an example of bad weather)
'managed to get one' is the wordplay.
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to get' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'ran' going around 'i' is 'RAIN'.
'in' is the link.
(Other definitions for rain that I've seen before include "Fall in large quantities" , "Falling moisture" , "See 12" , "previous rule?" , "Falling water" .)