Island keeping temperature in cold sea (6)
I believe the answer is:
baltic
'sea' is the definition.
(I know that Baltic is a sea)
'island keeping temperature in cold' is the wordplay.
'island' becomes 'bali' (Indonesian island).
'keeping' means one lot of letters goes inside another (some letters kept inside).
'temperature' becomes 't' (abbreviation).
'in cold' becomes 'c' (eg on taps. I am not sure about the 'in' bit.).
'bali' going around 't' is 'balti'.
'balti'+'c'='BALTIC'
Can you help me to learn more?
(Other definitions for baltic that I've seen before include "Northern European sea" , "Almost land-locked sea of Scandinavia" , "Almost land-locked sea of NE Europe" , "cold waters" , "Near land-locked sea of Scandinavia" .)