Burn Rodney's nose in scalding vapour (6)
I believe the answer is:
stream
'burn' is the definition.
(burn is a Scottish dialect word for a stream)
'rodney's nose in scalding vapour' is the wordplay.
'nose' indicates taking the first letters (nose can mean the front of something).
'in' indicates putting letters inside.
'scalding vapour' becomes 'steam' (hot vapour from boiling water).
The initial letter of 'rodney' is 'r'.
'r' put inside 'steam' is 'STREAM'.
(Other definitions for stream that I've seen before include "Current - file" , "Flock" , "group of schoolchildren" , "Moving water" , "play in real time" .)