Account sort code with money staked externally (8)
I believe the answer is:
anecdote
'account' is the definition.
(anecdote is a kind of account)
'sort code with money staked externally' is the wordplay.
I cannot really see how this works, but
an anagram of 'code' is 'ecdo' which is within the answer.
The remaining letters 'ante' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for anecdote that I've seen before include "Neat code (anag.)" , "Date once (anag.)" , "Brief story" , "One acted (anag) - amusing reminiscence" , "Pithy account of an incident" .)