Sack John Torode to start with (4)
I believe the answer is:
loot
'sack' is the definition.
(I've seen this in another clue)
'john torode to start with' is the wordplay.
'john' becomes 'loo' (both can mean a toilet).
'to start with' says to take the initial letters.
The first letter of 'torode' is 't'.
'loo'+'t'='LOOT'
(Other definitions for loot that I've seen before include "Prize" , "Plunder, pillage" , "Plunder - booty" , "Burglar's takings - pillage" , "Stolen goods" .)