A place to scale with ease but a scariest (9)
I believe the answer is:
staircase
'a place' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'scale with ease but a scariest' is the wordplay.
'a scariest' anagrams to 'STAIRCASE'.
However, I am not clear how the anagram is indicated.
'to' is the link.
Can you help me to learn more?
(Other definitions for staircase that I've seen before include "Situation of flight" , "A group of linked canal locks" , "Indoor flight" , "Route between floors" , "part of the mansion?" .)