Chicken withdrew $1000 from bank ATM perhaps (6)
I believe the answer is:
bantam
'chicken' is the definition.
(I know that Bantam is a type of chicken)
'withdrew $1000 from bank atm perhaps' is the wordplay.
I cannot really understand how this works, but
an anagram of 'atm' is 'tam' which is present in the answer.
The remaining letters 'ban' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bantam that I've seen before include "Little clucker" , "aggressive little sort" , "Dwarf variety of domestic fowl" , "Supplier of eggs" , "Aggressive person" .)