Cut leak outside empty toilet (8)
I believe the answer is:
escalope
'cut' is the definition.
(escalope is a kind of cut)
'leak outside empty toilet' is the wordplay.
'leak' becomes 'escape' (I've seen this before).
'outside' means one lot of letters goes inside another (some letters go outside others).
'empty' suggests removing the centre.
'toilet' becomes 'loo' (loo can informally mean a toilet).
'loo' with its middle removed is 'lo'.
'escape' going around 'lo' is 'ESCALOPE'.
(Other definitions for escalope that I've seen before include "Thin slice of boneless veal" , "Thin slice of boneless meat" , "Cut of meat" , "Thin piece of meat" , "F" .)