Evidence found in Somali bin (5)
I believe the answer is:
alibi
'evidence' is the definition.
(an alibi might be given to the police as evidence)
'in somali bin' is the wordplay.
'in' indicates a hidden word.
'ALIBI' is hidden in the letters of 'somali bin'.
'found' is the link.
(Other definitions for alibi that I've seen before include "Defence of being elsewhere at time of crime" , "Excuse for failure" , ""suspect's story"" , "Proof of being somewhere else at the time" , "Sort of explanation" .)