Useful outlet if things get out of hand at a housewarming (4,6)
I believe the answer is:
fire escape
'useful outlet' is the definition.
'fire escape' can be an answer for 'outlet' (I've seen this in another clue). I am not certain of the 'useful' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for fire escape that I've seen before include "Evacuation staircase" , "Emergency flight perhaps" , "steps outside" , "get-out" , "Emergency exit" .)