Stream of gas upset some homeowners, initially (4)
I believe the answer is:
gush
'stream' is the definition.
(I've seen this in another clue)
'gas upset some homeowners initially' is the wordplay.
'initially' says to take the initial letters.
The first letters of 'gas upset some homeowners' is 'GUSH'.
'of' acts as a link.
(Other definitions for gush that I've seen before include "Speak effusively" , "Spout like geyser" , "Spout like oil-well" , "Talk effusively" , "Sudden stream or jet" .)