American subject taking in English and Irish county (5)
I believe the answer is:
meath
'irish county' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for meath that I've seen before include "Irish county of ancient kings, site of Tara" , "part of Ireland" , "County NW of Dublin" , "Tara's county" , "lost province" .)