Deem rallies out of order in Ireland (7,4)
I believe the answer is:
emerald isle
'ireland' is the definition.
('Emerald Isle' can be a synonym of 'ireland')
'deem rallies out of order' is the wordplay.
'out of order' indicates anagramming the letters.
'deem'+'rallies'='deemrallies'
'deemrallies' is an anagram of 'EMERALD ISLE'.
'in' acts as a link.
(Other definitions for emerald isle that I've seen before include "jewel of a place" , "Name for Ireland" , "where one might get whiskey" , "divided country" .)