It's cold at the Pole but not unpleasant (4)
I believe the answer is:
nice
'not unpleasant' is the definition.
I can't tell whether this definition defines the answer.
'it's cold at the pole' is the wordplay.
'it's cold' becomes 'ice' (I've seen this before).
'at' means one lot of letters go next to another (I've seen this in other clues).
'the pole' becomes 'n' (abbreviation for North, as in North Pole).
'ice' put after 'n' is 'NICE'.
'but' acts as a link.
Can you help me to learn more?
(Other definitions for nice that I've seen before include "Leading resort on the French Riviera" , "Place in France that sounds agreeable?" , "Delightful - exact - holiday resort" , "Enjoyable" , "Delightful - French resort" .)