I dash through extremely cold country (7)
I believe the answer is:
iceland
'country' is the definition.
(Iceland is an example)
'i dash through extremely cold' is the wordplay.
'dash' becomes 'elan' ('elan' can be a synonym of 'dash'**).
'through' indicates putting letters inside (I've seen this in other clues).
'extremely' means to remove the middle letters.
'cold' with its centre taken out is 'cd'.
'elan' put inside 'cd' is 'celand'.
'i'+'celand'='ICELAND'
(Other definitions for iceland that I've seen before include "Home to the volcano Eyjafjallajokull" , "North Atlantic country" , "Land of geysers and Norse sagas" , "Former Danish colony" , "N. Atlantic nation" .)