Leave accompanied by, to tow (8)
I believe the answer is:
withdraw
'leave' is the definition.
(I've seen this before)
'accompanied by to tow' is the wordplay.
'accompanied by' becomes 'with' (I've seen this before).
'to tow' becomes 'draw'.
'with'+'draw'='WITHDRAW'
(Other definitions for withdraw that I've seen before include "Remove, take away" , "Extract" , "Recoil" , "Take money out of a bank account" , "Recant" .)