One lying about securing international portfolio (7)
I believe the answer is:
dossier
'one lying about securing international portfolio' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'one' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
The remaining letters 'dosser' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for dossier that I've seen before include "brief" , "A collection of papers" , "Report" , "Papers containing detailed information about someone" , "Set of papers" .)