Brandy very appealing initially, as cold unfortunately outside (8)
I believe the answer is:
calvados
'brandy' is the definition.
(Calvados is an example)
'very appealing initially as cold unfortunately outside' is the wordplay.
'initially' suggests taking the first letters.
'unfortunately' indicates anagramming the letters.
'outside' is an insertion indicator.
The initial letters of 'very appealing' is 'va'.
'as'+'cold'='ascold'
'ascold' is an anagram of 'caldos'.
'va' inserted within 'caldos' is 'CALVADOS'.
(Other definitions for calvados that I've seen before include "Type of apple brandy" , "Vocal ads (anag) - apple brandy" , "area near Caen" , "Brandy distilled from apple cider" , "drink" .)