Cold place on the borders of Kamchatka, unfortunately (6)
I believe the answer is:
alaska
'cold place' is the definition.
(I've seen this before)
'on the borders of kamchatka unfortunately' is the wordplay.
'on' means one lot of letters go next to another.
'the borders of' says to hollow out the word (remove centre letters).
'unfortunately' becomes 'alas' ('alas' is used to express regret).
'kamchatka' with its middle removed is 'ka'.
'ka' after 'alas' is 'ALASKA'.
(Other definitions for alaska that I've seen before include "Separate state" , "Land bought by the USA from Russia in 1867" , "Northernmost US state" , "Sarah Palin's home state" , "Most northerly state of America" .)