Secret ice store melted (8)
I believe the answer is:
esoteric
'secret' is the definition.
(similar in meaning)
'ice store melted' is the wordplay.
'melted' indicates an anagram.
'ice'+'store'='icestore'
'icestore' with letters rearranged gives 'ESOTERIC'.
(Other definitions for esoteric that I've seen before include "Tie score (anagram)" , "Understood by only a few people" , "Secret kind of coteries" , "hidden" , "Understandable by only an enlightened inner circle" .)