The pound enters into the foreign coin’s history (6)
I believe the answer is:
annals
'history' is the definition.
(annals is a kind of history)
'the pound enters into the foreign coin's' is the wordplay.
I cannot really understand how this works, but
'pound' could be 'l' (the pound sign is based on an L) and 'l' is present in the answer.
'coin' could be 'anna' (I have seen 'Old coin' mean 'anna' so perhaps 'coin' could also mean 'anna') and 'anna' is present in the answer.
A single letter 's' remains 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 annals that I've seen before include "Chronological records, yearbooks" , "Historical records" , "Tomorrow (Spanish)" , "The Four Masters wrote them in 17th century" , "History of events year by year" .)