Overbearing first person is knocking back agent with signed declarations concerning debt (9)
I believe the answer is:
imperious
'overbearing' is the definition.
(I've seen this in another clue)
'first person is knocking back agent with signed declarations concerning debt' is the wordplay.
I cannot really see how this works, but
'first' could be 'i' (I in Roman numerals eg Elizabeth I) and 'i' is present in the answer.
'person' could be 'peri' (peri is a kind of person) and 'peri' is located in the answer.
The remaining letters 'mous' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for imperious that I've seen before include "Bossy" , "high-handed" , "Arrogant, domineering" , "Haughty - domineering" .)