Since cold, somehow attractive (6)
I believe the answer is:
scenic
'attractive' is the definition.
(I've seen this before)
'since cold somehow' is the wordplay.
'cold' becomes 'C' (eg on taps).
'somehow' indicates an anagram.
'since'+'c'='sincec'
'sincec' anagrammed gives 'SCENIC'.
(Other definitions for scenic that I've seen before include "Like beautiful views" , "Like beautiful landscape" , "Such a railway" , "They are usually the long way round!" , "Offering beautiful view" .)