Emergency replacement (7)
I believe the answer is:
standby
(Other definitions for standby that I've seen before include "reserve" , "Item or person ready for use in emergency" .)
I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.