The witness was given 'blanket' protection from prosecution. [=the witness would not be prosecuted for anything]
The job was her 'security blanket'. [=the job was the thing that made her feel safe and secure]
A 'blanket' of gloom spread over the crowd when they realized their team would lose.
(..) with blinding team... A cloth about her head where late a crown had stood... And for a robe around her gaunt and blood soaked limbs... A blanket in the alarm of fear caught up, who had this seen... ...with tongue in venom steeped 'gainst fortunes state would treason have pronounced (..)2015 Hamlet