Backup plan if a flea’s flying around (4-4)
I believe the answer is:
fail-safe
'backup plan if a flea's flying around' is the definition.
I can't judge whether this defines the answer.
'if a flea's flying around' is the wordplay.
'flying around' is an anagram indicator.
'if'+'a'+'fleas'='ifafleas'
'ifafleas' anagrammed gives 'FAIL-SAFE'.
Can you help me to learn more?
(Other definitions for fail-safe that I've seen before include "Unlikely to go wrong" , "Designed to prevent accidents in the case of malfunction" , "Sure to succeed" , "Device to ensure proper operation" , "Designed never to stop working" .)