Cut loose from publicity given to breach (6)
I believe the answer is:
adrift
'cut loose' is the definition.
(I've seen this before)
'publicity given to breach' is the wordplay.
'publicity' becomes 'ad' (short for advert).
'given to' says to put letters next to each other.
'breach' becomes 'rift' (I've seen this in another clue).
'ad'+'rift'='ADRIFT'
'from' acts as a link.
(Other definitions for adrift that I've seen before include "(Of ship) out of control" , "cut loose" , "Aimlessly floating" , "like Mary Celeste?" , "Floating unattached as at sea" .)