A lone militant goes berserk in the blink of an eye (2,2,4,2,3)
I believe the answer is:
in no time at all
'the blink of an eye' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'a lone militant goes berserk' is the wordplay.
'goes berserk' is an anagram indicator.
'a'+'lone'+'militant'='alonemilitant'
'alonemilitant' anagrammed gives 'IN NO TIME AT ALL'.
'in' is the link.
Can you help me to learn more?
(Other definitions for in no time at all that I've seen before include "soon" , "very quickly - with 13a" .)