Drunk left behind outside without money (6)
I believe the answer is:
blotto
'drunk' is the definition.
(slang term)
'left behind outside without money' is the wordplay.
'left behind outside' becomes 'botto' (I can't justify this - if you can you should give a lot more credence to this answer).
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'money' becomes 'l' (L can mean 'pounds').
'botto' enclosing 'l' is 'BLOTTO'.
Can you help me to learn more?
(Other definitions for blotto that I've seen before include "under the table" , "Stoned" , "Smashed" , "wrecked" , "Slangily drunk - ready to bolt" .)