Course includes bread and Irish cheese (10)
I believe the answer is:
lancashire
'cheese' is the definition.
(I've seen this before)
'course includes bread and irish' is the wordplay.
'course' becomes 'lane' (a lane is a path or course).
'includes' is an insertion indicator.
'bread' becomes 'cash' (I've seen this before).
'and' means one lot of letters go next to another.
'irish' becomes 'IR' (abbreviation).
'cash'+'ir'='cashir'
'lane' enclosing 'cashir' is 'LANCASHIRE'.
(Other definitions for lancashire that I've seen before include "North-Western county" , "it includes Leyland" , "Part of country" , "County of NW England" , "Crumbly white cheese" .)