Lout in a mob rampaging is individually exposed (3,2,1,4)
I believe the answer is:
out on a limb
'individually exposed' is the definition.
'out on a limb' can be an answer for 'exposed' (thesaurus). I'm not sure about the 'individually' bit.
'lout in a mob rampaging' is the wordplay.
'rampaging' indicates anagramming the letters.
'lout'+'in'+'a'+'mob'='loutinamob'
'loutinamob' is an anagram of 'OUT ON A LIMB'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for out on a limb that I've seen before include "In a precarious position" , "Wing-walking" , "In a vulnerable position" , "Alone and in danger" , "Exposed, vulnerable" .)