Legal defences of being somewhere else at times of crimes (6)
I believe the answer is:
alibis
'legal defences of being somewhere else at times of crimes' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for alibis that I've seen before include "Proofs of absence from the scene of the crime" , "Pleas of being elsewhere at the time of a crime" , "Defences of being elsewhere at the time of a crime" , "Excuses" , "Proofs accused was elsewhere at time of crime" .)