Outbreak from feral bats ahead (5-2)
I believe the answer is:
flare-up
'outbreak' is the definition.
(thesaurus)
'feral bats ahead' is the wordplay.
'bats' is an anagram indicator (slang for mad).
'ahead' becomes 'up' (similar in meaning).
'feral' with letters rearranged gives 'flare'.
'flare'+'up'='FLARE-UP'
'from' is the link.
(Other definitions for flare-up that I've seen before include "Burst into flames" , "Sudden outburst" , "Sudden burst of light" , "Explosion of emotion" , "Sudden outbreak (of violence, etc)" .)