Outs (6)
I believe the answer is:
alibis
'outs' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alibis that I've seen before include "Defences of being elsewhere at times of crimes" , "Proofs accused was elsewhere at time of crime" , "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" .)